Just yesterday I wiped the drive and installed Linux on the 3rd old PC for the LAN setup I'm putting together, literally "for the children!"
It's an i7-920 from 2008. It has TRIPLE channel ram, baby. I installed Linux Mint Cinnamon and it was as quick and painless as usual.
I already get the warm fuzzies when I walk into the room and find my 3rd grader playing on my PC instead of their tablet or even the console. Our first LAN party is gonna be sweet.