For me, the individual placing of items gets pretty tedious. Solving nuclear power is interesting once but placing the same thing a second, third or tenth time is pretty dull.
The challenge of Factorio shifts throughout the game - initially you're worrying about individual metal plates and then you're dealing with belts full and then it's entire sections of your factory. This is why the Space Age DLC is so fun, it adds an entire new dimension of worrying about getting things between planets in a timely fashion.
Eventually the final boss is UPS (basically the performance of the game on your computer). Suddenly "the factory must grow" stops being the solution to your problems and usually makes things worse.
I don't think it ever reaches "vibe coding" levels - true, you can end up not knowing how part of your factory works but it's still a lot more active than just typing in a bunch of prompts.
I use exactly 3 exceptions between saves:
1. First generation ship to just get me to space
2. Second generation ship to get me to the other planets
3. Third generation ship to get me to the Shattered Planet
Everything else, I'm with you. I don't use blueprints between saves.
With how much of a pain it is to deal with building in space, I'd rather just use the same blueprint.
So the first iteration of the design is always slightly wonky, so it remains fun :)
So far I've only been using the world-specific blueprint storage. That seems reasonable to me - you have to make things at least once in this playthrough before copying them. That would happen anyway since of course all the factories are different with the mods. Except I imported a book of balancer blueprints from the internet because spending time designing inefficient balancers did not seem fun to me.
When you switch to blueprints, you move up the abstraction chain; there’s still some optimization in constructing blueprints but largely you’re now just plumbing… chaining together higher level components, simply ensuring inputs == output, and all the microoptimizations are hard to justify because they disrupt your blueprints. The patterns and structures have reduced to only what you’ve specified in your library (where previously you were discovering them out of the many operators the game provides).
But the literal act of placing objects wasn’t the point, yet that’s all the game has become.
In general, I get bored when I've figured out the solution to a problem but it takes a long time to get it implemented. Which is also why building conveyor belts is typically my least favourite part of any factory game and why I very rarely refactor my base.
The planets in Factorio have new buildings, new mechanics, and certain resources are cheap while others are more scarce.
In Angel's Mods, much more than in the base game, there are so many of these points where your old factory process line is obsolete and your best option is to completely dismantle it and build the newer process you just unlocked, although the old one can keep running until you get around to that. It's a nonstop circus of redesigning and rebuilding. They haven't introduced any fundamentally new mechanics mind you - that all just comes from expansions in the set of recipes and machines available (and there's a reason every Angel's modpack includes Helmod). I've never tried Pyanodon's. Bob's Inserters also makes you want to redesign your layouts every time you unlock new inserter directions.
Part of the game is designing copy-pastable layouts that you can just repeat in a row, or tile in a grid - once you get to the stage where that's practical to do. You don't build each copy individually, you let your bots do it. If your bots can't do it then make it so they can, before you can say you're at this milestone. Also trains make grid patterns or "city blocks" very practical.
Not a factory game, but the designers of Portal 2 talked about this. They noticed that in the first game there were puzzles where people would figure out what to do, but then get stuck on actually being able to do it, which was frustrating. So for the second game they endeavored to make it so that the challenge was always in the solution to the puzzle, never in executing the solution.
My point was: I play Factorio for fun and it reminds of me of what programming was like before AI coding. In Factorio, all the automations you build are proper abstractions that you yourself actually designed.
And that lets me focus more on the stuff that I do like to work on in the game.
Figuring out a universal assembler that keeps a list of mundane odds-and-ends in-stock. Working out that shipping from the bottomless seas of Fulgora to Vulcanus where oil is expensive can be a net positive, even though many assume that it must be a bust. Sorting out the unusual steel barrel management problems this creates. Tweaking asteroid collection, and conversion, and eventually working the kinks out of the huge space casino ships that start becoming essentially inevitable.
And the best part of those space factories: Once I have a design that is finished, I can copy and paste it. Replication is simple.
There's other parts that I avoid, like: Main buses. They're efficient, but I tend to lean towards organic spaghetti belts because that's more funner-er for me.
Or trains. I don't use them much. They're cool and all; they just don't usually scratch my itch. They promote vast expansion, but when interplanetary logistics and the space factories are going full-swing then my need to expand on any one planet dwindles considerably.
Lots of people play the game differently than I do and that's perfectly fine. Some people like to program in assembler, and some people might prefer to work in Python.
Others can't even get the syntax right. When they need software written, they can get help from a friend, hire someone to write the code for them, or (with enough of the right kinds of supervision) get a bot to do it instead.
Some people enjoy running around and chopping trees.
It's OK to operate at a very low level. It's also OK to work at a very high level. If the results are rewarding, then chances are good that they're doing it right.
(Anyway, the birds are singing again.)
it takes a very long time to build a library of everything now with the DLC. and then there are high quality overhaul mods with far more convoluted production chains.