Which is really a positive - if you start a new effort in F#, it basically self-selects for the most technically curious or proficient devs. Most corporate C# code-slingers are fearful of learning it or putting themselves through the mindset shift required to grok basic FP principles. "Do you know or are you interested in learning F#" becomes the only interview question required. But I do agree, if you have to build a team around the "least common denominator" then pick the boring tech stack and go.