Even going back so far that modern OS support is absent, snappiness can be found. My circa 2000 500Mhz PowerBook G3 running Mac OS 9.1 doesn’t feel appreciably slower than its modern day counterpart for more than one might expect, and some things like typing latency are actually better.
git://bitreich.org/privacy-haters
However YouTube and Gmail brought it to a crawl. I had to sell it because Youtube Music slowed down my work.
Then after going mass market OEMs put full windows and client software on there, and the web became heavier so webmail or simple office/collaboration slowed down. After that mobile/tablets were in competition for the market, and has practically devoured non-professional usage for PCs outside of gaming.
What I keep coming back to is bundling versus unbundling - having one tool to do everything with likely inevitable compromises, versus splitting into a number of precise specialized ones. It's difficult to convince any decent number of people to take something that does less.