Microsoft is arguably working on it: They offered up exFAT support to Linux, and it's been added to the kernel. SQL Server being supported on Linux is huge. Probably the absolute biggest selling point to Windows-based infrastructure remains Active Directory, and if you're cool with being cloud-based (I'm not, FWIW), they offer that through Azure now.

Windows is like three decades of legacy systems, but I would argue many of Microsoft's recent decisions have been at the cost of their Windows division.