Yeah, if it was a gaming PC it would have no problem doing Nas and steam. I wouldn't bother with kubernetes or docker though. Just use Linux, no need for containers.
Probably not what you're after, but: I decorate the walls in my home-office with discarded motherboards.
I work with processing clusters that operate in harsh (humid) environments, so the failure rate is quite high. Supermicro X11 boards tile pretty neatly.