Ubuntu on Windows

This is Microsoft's response to the decreasing fraction of competent developers willing to shackle their careers to the Windows ecosystem. Not long ago it was considered perfectly sensible to lock yourself into MS-only languages, libraries, and tools, but it's finally recognized as extremely short-sighted. Offering the ability to work like a normal developer helps to keep them closer to competitive.

Part of this is that developers who still are locked into MS are competing with each other in a shrinking market at cut-rate prices. So, there are still plenty of them, but they are the ones who work for less because they must.