Hi brwn! That’s awesome because I’m a .NET guy too. I’ve done Microsoft development for 20+ years. I too have always consider Visual Studio a best-in-class IDE. But honestly, after using WebStorm, when I go back to Visual Studio if feels sluggish and old-fashioned. CTRL + K, CTRL + C (comment); CTRL + K, CTRL + U (uncomment) who came up with that monstrosity? 
Now I feel like Webstorm is the more innovative and modern editor in many ways. Your mileage may very, but just wanted to share my testimonial that it was very worthwhile in my experience. Far better than Sublime and ATOM for sure.
But I hear you. Switching tools came be uncomfortable. I also switched cold turkey to a Kinesis keyboard on my Windows machine last year.
Painful learning experience, but well worth it for my comfort. I’ve learned to enjoy the awkwardness of learning a new skill.
Another change I made was to buy a Mac. It’s a much better machine for doing web development than Windows because the OS is essentially the same as a web server. That took some getting used to as well, and I can’t say it’s better in every way. Windows Explorer is much more powerful than OSX Finder. Now I use both Windows and Mac at my office and only use a MacBook Pro at home and while traveling.
So as a .NET guy myself, I now find Meteor development with WebStorm on a Mac to be even more fun that .NET dev with Visual Studio. Webstorm has a lot of the editor tools you’ve grown to love and some which you’ll wonder how you lived without.