Just War Thunder

Good times

Intel NUC is probably the best choice - silent, possible to have two SSDs, pretty low powered.

Personally, I did settle with 13 Dell optiplexes 9020 SFF

Well thats true for all software - being free/libre or not. It just takes time to get used to it.

For example, when I get a new phone - I spend the next months complaining over how much better the previous one was, until I dont.