I had the same CPU from 2019 until a few weeks ago. Upgraded to a 5700X (electricity is expensive around here, so the lower wattage parts are appealing); with more aggressive memory timing got about 20% improvement in video encoding (main cpu-bound task I do regularly). With selling the 3700X net cost for upgrade was around $100- not a bad deal, even though I stuck with the stock cooler! This is after I have also doubled the RAM from the original build to 32G for ~$60 last October. I expect to get another 3-4 years of of this AM4/DDR4 rig before big overhaul.
Decades ago I did similar things, but the cadence was much faster (annual sometimes); my conclusion, like that of many others, is that PCs are usable for much longer these days. A net positive I believe.
100% this. If my motherboard hadn't started to slowly fail (been running on the backup BIOS for the past year), I'd still use my 2013 Xeon system. It's still fast enough for daily use and as long as I'm not recompiling large codebases, it's still fine today.
I plan on using my new rig for at least 6 to 8 years as well. The times when CPU performance literally doubled every other year are simply over. For the average user, literally any mainstream CPU released in the past 5 to 8 years will actually do just fine (stuff like high-end gaming and video editing aside).
Decades ago I did similar things, but the cadence was much faster (annual sometimes); my conclusion, like that of many others, is that PCs are usable for much longer these days. A net positive I believe.