I used to work at a .NET shop. The reason I wouldn’t personally use .NET is MS lock-in. Open source is basically non-existent. Documentation is really bad for getting anything done in a headless way. I don’t enjoy Remote Desktop or running Windows in the cloud.

And while .NET is batteries included like Rails, I just don’t enjoy using it. The docs and frameworks aren’t written for nimble startups, but slow-moving enterprise companies. I know modern C# allows me to code like Ruby/Python/JS, but all the docs are written like 1990s Java. And the frameworks are designed that way too.