As well he should be.
The only places where I'm using MS Server now are the big business applications that are written only for Windows Server and MS-SQL. Everything else is getting phased out over time and converted to Linux.
Yep, the only reason we still use our windows/VMware internal DC are for big .net apps. Which will be rebuilt but it takes time.
I see the future, and it’s not MS. Sad, really, but they have to take some of the blame.