I'm operating an 8xPi4/8GB cluster here, the 8GB Pi4s make this a bit more interesting, but my use case is this: I use Wireguard to backhaul an AWS EIP address,

I'm operating an 8xPi4/8GB cluster here, the 8GB Pi4s make this a bit more interesting, but my use case is this: I use Wireguard to backhaul an AWS EIP address, and use k8s to manage instances of various small services (gitlab, websites, wordpress+web application firewall, etc), simulate AWS Lambda, and just generally have fun. But to your point: No, it certainly isn't something I undertook with pure practicality in mind.