17 year old Dell here. Threw a SSD and Linux on it and that damn thing boots faster than most brand new Desktops. Absolutely enough to surf the web, listen to music, watch videos or do the usual Linux stuff (ssh, etc.). You can even somewhat game on it via sunshine/moonlight.
I did the same with a Dell Wyse thin client laptop I acquired from work. Upgraded the RAM, popped a larger SSD into it, and installed Debian. Thing works great for the basics and I just RDP into my desktop for more intensive tasks.