8nm, pretty power efficient. I've measured it to run at 0.7A@5V idle and 1.2A@5V with all 8 cores loaded with md5sum /dev/zero; iirc it had 1 ethernet connected, no other periphery. Running on Armbian.
A lot more computing power than the Pi 4 and older home server it replaced. The M.2 slot was an absolute game changer. Real onboard storage is a must.
It runs a few low resource VMs in the garage and I almost completely forget it exists.
arm64 has come a long way for that use case.
It's been solid as the VM host so far. I wrote an Armbian SD card and it just worked. Once a VM is booted though, many things become irrelevant outside of arm64 support.
I haven't tried again since February, so there's a decent chance my issues are fixed, but ZFS wouldn't build and VLAN support was disabled for the NIC. Not blockers, but it did make me rethink some ideas I had.