Any Linux distribution where you can choose components will work. For example, NixOS, GuixSD, Arch Linux, Alpine... On old hardware, the best thing you can do

Any Linux distribution where you can choose components will work. For example, NixOS, GuixSD, Arch Linux, Alpine... On old hardware, the best thing you can do is to set it up without a desktop environment. So just a window manager running on bare X. I like this setup so much I also use it on fast machines. Latency is way lower.