I've been doing Rails dev on Windows for a couple of years now (I use cmder/conemu, not the linux subystem). For the most part, my workflow is similar to what I was doing when I was on Mac, but I guess it really depends on what you're doing.

If there's something in Rails you can't do in Windows proper, you can still opt to use Vagrant on Windows for a more pure unix experience.

It's a shame, because that excuse makes no sense.