Very much this - most of my experience is with Postgres but the rough impression I have is that SQL Server is the best of both Postgres and MySQL, and Postgres and MySQL are improving, but not in any great direction towards what SQL Server offers.
From the operations perspective, SQL Server is definitely way better that Postgres - monitoring is such a pain point in Postgres, for example. From application development/feature perspective, it's much closer, and server-side programming in Postgres (if that's what you like/need) is simply better that in SQL Server.
