I'm not sure if I agree. If a startup itself was "sexy", it would show up in discussions regardless of what tech stack it was using. That they don't show up is

I'm not sure if I agree. If a startup itself was "sexy", it would show up in discussions regardless of what tech stack it was using. That they don't show up is more indicative that there aren't that many in the first place IMHO. Speaking as a former .NET developer, something that impedes searching for a .NET job that isn't at a huge, crufty, old school enterprise company is that the vast majority of .NET jobs are at such companies. So you have to sift through all of those to find something that doesn't fit that mold.