I’ve got several for random little tasks that crop up, but main use is for the conbee II I have running the zigbee network for all the smart lights. I’ve got a UPS hat using some old 26650 cells for battery backup, mostly so that if power cuts off I don’t run into any issues with the setup and the rare cases where I have to take the power off the server rack for whatever reason. RPi has actually been rock solid for couple years now so no issues with that side, wife approval factor has likewise been high

For most everything else I’m running a docker and VMs in TrueNAS, but would probably change that setup at some point…