Perhaps the math will change if the hardware market stagnates and people are keeping computers and phones for 10 years. Perhaps it will even become a product differentiator again. Perhaps I'm delusional :).
Well, some of the "old school" has left the market of natural causes since the 2000s.
That only leaves the rest of 'em. Wer dey go, and what are your top 3 reasons for how the values of the 2000s era failed to transmit to the next generation of developers?
I have an example.
I use Logos (a Bible study app, library ecosystem, and tools) partially for my own faith and interests, and partially because I now teach an adult Sunday school class. The desktop version has gotten considerably worse over the last 2-3 years in terms of general performance, and I won't even try to run it under Wine. The mobile versions lack many of the features available for desktop, but even there, they've been plagued by weird UI bugs for both Android and iOS that seem to have been exacerbated since Faithlife switched to a subscription model. Perhaps part of it is their push to include AI-driven features, no longer prioritizing long-standing bugs, but I think it's a growing combination of company priorities and framework choices.
Oh, for simpler days, and I'm not sure I'm saying that to be curmudgeonly!
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[0] - Having https://sectograph.com/ as a watch face is 80%+ of value of having a modern smartwatch to me. Otherwise, I wouldn't bother. I really miss Pebble.
("Why don't you just close firefox?" No thanks, I've lost tab state too many times on restart to ever trust its sessionstore. In-memory is much safer.)
You have to close Firefox every now and then for updates though. The issue you describe seems better dealt with on filesystem level with a CoW filesystem such as ZFS. That way, versioning and snapshots are a breeze, and your whole homedir could benefit.
For the rest: I agree with you.
And when, for whatever reason, having a "desktop application" becomes a priority to developers, what do they do? Write it in Electron and ship a browser engine with their app. Yuuuuuuck!