Yes, many people instinctively stay away from anything microsoft (except github, typescript and npm). But the stack is solid. I’m always reminded of Stack Overflow and how they built on asp.net and like 7 servers and it scaled very well for years.

Everyone has what they like and what they’re familiar with, and for better or worse, especially for startups it’s rarely .net. But I couldn’t imagine e.g. using js instead on the back end, but that’s just me.