First of all, what flamebait but I'll bite "Even worse, every day spent learning a Microsoft kitchen takes TWO days to unlearn, meaning once you get a reasonab

First of all, what flamebait but I'll bite "Even worse, every day spent learning a Microsoft kitchen takes TWO days to unlearn, meaning once you get a reasonable way down the .NET career path, there is almost no going back." That's not true in my experience. I work at small, profitable company using Linux / Python / Amazon Web Services, we have some fantastic developers who came from a pure .NET background - some worked at Microsoft. They transitioned successfully because of their attitude. If you commit yourself to learning the tools and not fighting them, you can make the transition in a couple months - no problem.