I know where .NET fits: game development and legacy Windows apps. Otherwise, we don't need .NET—and let's not forget how HN feels when they have to deal with the MS tech stack.
You have absolutely no clue what you're talking about, mate. .NET is like Java. It's behind critical systems you haven't heard of because they're not flashy or glamorous, so you have no idea how prevalent they actually are.
The other posters are right. Most .NET projects today are backends, where it's used similarly to how Java is used.
