I am using a 12 year old Thinkpad as a secondary device. I don't see why it won't last me another 10. It runs a responsive and quite good looking modern Linux desktop environment from a HDD and I am not even using 40% of the RAM I have on it. I am obviously not encoding 4K video, running AI or AAA games on it, but for most things that people do on computers, it's perfectly fine.

This wasn't the case in 20-25 years ago when stuff would outdate real fast. 90% of people don't really need new computers.