We never had anything different, though. Computers always became so obsolete after a while that there was no longer any point in trying to upgrade them. I think I got eight years out of my 1997 Power Mac G3, including a CPU upgrade to a G4, RAM upgrades, hard disk upgrades, a video card, and USB expansion, but then the new machines coming out were just so much better that throwing money into more upgrades was just tossing it into a black hole.
I guess its a byproduct of a faster moving curve with improved technology. 20 years ago you didn't need to replace the entire platform for at least 10 years.
Maybe in the late 90s and early 2000s. These days hardware from over a decade ago works fine. I am typing this comment on a 2011 Dell E6410. Install Debian / Arch Linux and the machine is surprisingly capable. Just running HTOP I am using 2.5G of ram (out of 8GB) and the CPU is at 2%.
TBH, I have a Ryzen 5950X based tower and while it is faster than my previous desktop which was a i7 4970K (or whatever it is), the previous machine would be fine tbh. I am not even sure why I upgraded tbh.