I wish they'd write an official set of native MS SQL drivers for Linux, like they did with the PHP SQL drivers on Windows. Yes I know there's FreeTDS, unixODBC etc, but the level of faff getting it to work just so never fills me with confidence.
I'm happy that Linux doesn't have MS SQL drivers. The increasing cost of SQL Server licensing is the driving force towards PostgreSQL for many of our projects. The larger clients can afford the costs and seem to enjoy being treated as cash cows by Redmond.