[jpgvm]

People get overfixated on the runners. They don't matter. GHA, Buildkite, Jenkens, Gilab, doesn't matter. That isn't to say GHA isn't poo (it is and always has been poo) but it is to say it's not the actual problem.

The actual problem is using a bunch of unportable vendor YAML for literally anything.

Define your entire build + artifact publishing pipeline in something like Bazel, Nix, etc and completely decouple everything from the runner. This allows running it locally and also switching runners extremely easily if one of them is no longer to your liking.

Don't fall prey to the vendor YAML trap.