If it's Ubuntu, possible you had docker inside snap unintentionally and issues because of that? I had a bit trouble getting it integrated with certain versions of Podman, but that aside setting up kata was pretty straightforward.

I have so far only used it for hosting some gameservers which I don't trust, i.e some simple containers, but I really want to try it in a new k3s cluster once I get it setup and move some services there. I like the idea of putting internet facing ones into it as an additional layer of separation and could imagine it being useful in production.