I've been hearing this argument since I was heavily into Common Lisp in the early 2000s. Personally I like lisps so I hope Clojurescript does establish a viable niche.
But it's not the case that number of users is irrelevant. If I commit to Clojurescript (or Haskell, or any other niche language), I'm cutting my prospective job market down by 95%+. This means fewer companies I can work with, fewer places I can live, and fewer gigs available overall. Some might consider the tradeoff worth it but I don't.
I didn't say that the number of users is irrelevant. There needs to be a minimum user base to make a language viable, however beyond that it's just tradeoffs.
While you might be cutting down the job market, you're also focusing on companies that are forward thinking, get to work with great technology, and get perks such as remote work. The most exciting part for me is that you get to shape the future of the ecosystem. Being on the ground floor of a new technology means that you get a lot of say in how it will evolve. For me the tradeoff was absolutely worth it, but I can understand how it's not for everyone.
But it's not the case that number of users is irrelevant. If I commit to Clojurescript (or Haskell, or any other niche language), I'm cutting my prospective job market down by 95%+. This means fewer companies I can work with, fewer places I can live, and fewer gigs available overall. Some might consider the tradeoff worth it but I don't.