>Where does it stop?

I don't know but macOS is making it ever more difficult to manage storage, with lots of random things under "macOS" pushing ~40GB or "System Data" that gets a crapload of unrelated things like podcast [1] downloads, with no easy way to purge.

[1] I spent too much time hunting down ~250GB of missing disk space, and it turns out it was the Podcasts app's cache, while the app itself reported no downloads. I fully expected this to be managed automatically, but was getting out of disk space warnings. It's a mess.

My first Apple Silicon machine was an 8GB/512GB M1 MacBook Air. I rarely bumped up against the RAM, but I was pretty happy using between 300-400GB on the SSD, so I really think the 512GB was plenty. I have a 1TB machine now, and typically still use less than 512GB...but now and then I've found a good use for nearly all of that terabyte.

You're right, learning to manage storage space is important, but you need to have some storage space to manage first. 256GB is the bottom of the barrel.

I think 512GB is a fair minimum for a computer these days, but I agree with your "Where does it stop?" sentiment when it comes to RAM.

If browsing the web takes 12GB of RAM, at what point do we stop chasing after more RAM and instead start demanding better performance and resource usage out of the web?

I agree with the sentiment, but in general it's not worth my time to try to purge. I used to do that back in 2005. Heck, in the 1990s, I'd buy a new hard drive every year. But these days, I find that a hard drive lasts me for 5 years if I plan well.

From observing family members, 256GB is usually fine, but small enough that normal computer use can accidentally fill it up. 512GB provides plenty of headroom for them. 512GB is tight for more involved usage that’s not serious media creation, and 1TB is comfortable. 1TB seems like the realistic minimum for heavier media creation.

It doesn't stop, it's just where we are in this rolling window of time.

16GB of RAM (currently) works for 90% of professions daily needs.