This is just speculation on my part, but the technology being adopted is likely Linux. First Microsoft declares its war on Linux over (Microsoft loves Linux), then the Windows tooling is extended into Linux so the lines blur, then WSL was made so you don't have to leave Windows to use Linux tooling.

In my paranoid scenario, a happy ending (for Microsoft) would be: the release of its own Linux that "just works" with the mixed tooling, and young developers considering pure Linux just for small projects.