I am a big fan of thin clients as servers. It is true you lose the "built-in console and UPS", but they usually come in very nice and compact form factor, many

I am a big fan of thin clients as servers. It is true you lose the "built-in console and UPS", but they usually come in very nice and compact form factor, many are fanless and consume 10~15W tops while being acceptably capable (in general much more than a RPi but with much better memory and storage specs)