I've served in an operations capacity for exclusively *-nix, mixed-stack and primarily MS environments, and I will say that from my perspective the OSS community has more news, but I find that there's less that I actually care about.

I've actually been finding MS products more easy to work with lately, while Ubuntu has been getting more frustrating. Some of that is due to familiarity, but there's also a lot of decisions I've not agreed with. In general, I like that I can write something that works for a few years in Windows - I don't have to worry if the latest package updates are going to break everything. I've lost weeks fixing dependency bugs, and I don't seem to have the same issues on Windows.

It's not different. Half of Microsoft developments these days are them implementing some open source tech (like not-Windows in Azure, Node becoming close to first-class on IIS..)