It's very "power user" in that it's easy to get lost amongst all the options, but nothing else I've tried has the same breadth of OSes and ability to have one job depend on another in intricate ways. And, 10 free parallel builds, including macOS!
Also, hosted agents have small inconsistencies that make the pipeline to have ton of do this on Linux but not in OS X or windows and so forth...
And yet, here we are... Azure Pipelines
Edit: VS Code too
(Yeah, I know, all these CI things are hypothetically platform agnostic, but then there's reality, different platforms-under-test have different sorts of problems which become priorities for the CI platform to smooth out and make just work, or don't).
But Azure is def on my list to check out!