Edge is a very overloaded term that just means a server not in a datacenter imo, it could be a thick edge with 8 esx, hundreds or cores and gigabytes of memory in a shop or it could be a little single node box in a closet at someone’s home or it could be a light switch.

Technically they’re all edge, but nobody thinks K8s can run on the latter, but it might work on the prior two.