Today Microsoft didn’t write any OS and had only partial participation in programming language or framework. They open sourced .NET and in Windows 10 you can still see same behavior and internal as XP.

I wonder how many real top-tier engineers are there at Microsoft and how hard they have to work to prevent it from failing. It’s not uncommon in any bigger than probably 200 people company - the belief of having a lot of talents while having maybe 1% of the company capable of doing anything working.