My home desktop computer is about 10 years old, and the 24" LCD monitor attached to it is well over 15 years old--which blows my mind, frankly.
I bought it with money I saved from quitting smoking the year before and chose the best I could afford--i7 CPU, beast of a video card, 16 GB RAM, massive power supply, etc--so it would last me as long as possible and it's proved to be a decent investment in that regard. Turns out I needed a laptop for work so I tend to cart it back and forth and use it more than the desktop nowadays but it's still perfectly serviceable, even for light gaming--though I can't remember the last time I so much as launched Steam.
It has so many fans to keep it cool it sounds like a small plane warming up on the tarmac when you turn it on heh heh.
The last computer before that which I bought as a complete unit (well, bought the parts and built it, to be accurate) was 30 years ago or more and then I just upgraded parts after that until I'd replaced pretty much everything at least once--I called it Shitbucket because eventually it was all replacement parts I installed myself lol.
When it comes to tech I generally use it as long as it's even remotely adequate. For whatever reason my cell phone company gave me a free tablet about 4 years ago; the screen is cracked and it's kind of slow but I'm still using it and when it finally dies I won't be replacing it unless they weirdly decide to give me another free one lol