I went with AM4 because it was looking quite future proof back 10 years ago when i initially bought a Ryzen 1700. I upgraded from a 2700X to a 5800X3D last year and from 16 to 32GB of RAM. So yeah i definitely got lucky with the timing and with how long AMD kept making better CPUs for AM4.

Yup same here, my main system is a bit over 10 years old now but it was originally built all maxed out so it has lasted and worked great all this time. The GPU and hard drives were the only thing I ever bothered swapping out during all that time.

But like you said, past 10 years and you start to wonder how much longer the system is going to run for. I'm hoping mine lasts long enough past the AI craze that I'll be able to do a new build without the insane costs but who knows what the future will bring.