I'll chime in; for me this is a god send. I currently work with a client who specialises in working with automotive companies (Ford, Renault, Peugeot etc), and it turns out that automotive companies love MS SQL. The stack I'm working with is a Java/Linux stack with a Windows/MSSQL backend, simply because it didn't scare the customer as much as Linux/Java Linux/Postgres.
It looks like as an industry they are starting to loosen up a little now, but those MS SQL databases are going to be around for a while, and it'll be nice if I can at least standardise onto a single set of skills and install patterns for the platform OS.
And since running those Linux servers in Azure results in revenue flowing to Microsoft by the hour, it seems that MS also winning here. The cloud market share of Azure vs. AWS is however a different dogfight.
"If Microsoft ever does applications for Linux it means I've won." -Linus Torvalds