Github Actions gives me literally free server time across an extremely wide range of OS'es that I dont have to worry about at all, including Windows and OSX, which I therefore dont have to deal with in any way, buy any license keys, none of that. It's nothing short of miraculous for us as it's how Python projects can have binary wheel files for dozens of OSes and Python versions: https://pypi.org/project/SQLAlchemy/#files . This task remained impossible for years (to be clear: because I don't have a server farm, or Windows licenses, or however you'd run OSX on a headless server, or any kind of resources to fund / manage dozens of images and keep them running, or any of that) until GH Actions made it possible.

Now is this all part of Microsoft's evil plan ? It probably is! But unless someone else wants to give me a free server farm that includes Windows / OSX up and running without me paying anything / writing containers / storing images / etc. I dont see this aspect of Github actions losing any popularity.