How ready is Linux (or a BSD; I'm willing to learn!) for home server use? I understand there will be some growing pains for ARM chips as they venture into serv

How ready is Linux (or a BSD; I'm willing to learn!) for home server use? I understand there will be some growing pains for ARM chips as they venture into server land; the x86 ecosystem with a bazillion different motherboard / component options is much, MUCH further ahead. What about Docker or kubernetes? How about kvm / libvirt? Are they ready to rock on ARM? Having a few (mostly idle) x86_64 home servers consuming an unpleasantly high amount of power doing nothing, I really look forward to ARM. Not sure if the power savings would eclipse the savings I get from basically freeloading off of 3-year-old workstations destined for the recycler I grab from my employer, but as someone who frets over power utilization for a major cloud provider every day, I can't wait for ARM to get here!