I've been incredibly impressed by the hot reload solution that the .NET team has delivered. It's worked remarkably well in preview across multiple platforms and technologies. I've built my own hooks into the hot reload feature, and I've used it to get a tight feedback loop in many different kinds of applications. It's awesome.
I was so excited to be able to point to that feature and say "yes, .NET has a great developer experience - even outside Visual Studio". I haven't always been able to do that. And now... it's going away as a broadly available feature, so that some bean counter can use it to drive usage of a legacy IDE (I love Visual Studio, but let's not kid ourselves about where the future lies).
Immediate feedback (i.e. a fast inner loop) isn't a niche feature - it's an essential element of any creative activity (see: Bret Victor). They are crippling .NET and it hurts to see it.