Comment by everforward

I've poked at this a few times, and I think it breaks down for CI that needs/wants to run integration tests against other services. Eg it wants to spin up a Postgres server to actually execute queries against.

Managing those lifetimes is annoying, especially when it needs to work on desktops too. On the server side, you can do things like spin up a VM that CI runs in, use Docker in the VM to make dependencies in containers, and then delete the whole VM.

That's a lot of tooling to do locally though, and even then it's local but has so many abstractions that it might as well be running in the cloud.