Except Docker is still doing pretty well, all things considered. The only real competition on the dev side was Podman, and it was only half-baked (as a full desktop replacement) when Docker had it's massive ecosystem changes.

There are a lot of good Linux distros out there. Even ones with commercial support.

The software world can have multiple solutions to the same problem, right?

I’ve been using Rancher Desktop for the last few months (with the moby runtime) and it has been working well. They just had another big release that fixed a few more incompatibility issues too. I wouldn’t call it half-baked.