Another perfect execution of embrace(Microsoft became the steward of the Mono Project when it acquired Xamarin), extend(Microsoft maintains a modern fork of Mono runtime in the dotnet/runtime repo and has been progressively moving workloads to that fork), extinguish(we recommend that active Mono users and maintainers of Mono-based app frameworks migrate to .NET) for anyone who thought MS had actually changed since the bad old days.
Only wrinkle is that Mono was originally a .NET runtime for Linux. So they weren't embracing an external standard but a knock-off of their own. But I still agree with elements of your statement in principle. However, giving Mono back to open source is an interesting development and I don't know how it fits in your narrative.
That's not what EEE is. For starters, the term applies to standards, not to implementations. The standard here is .NET, which Microsoft controlled from the start.
