I belong to a large shooting club. Within that club we have a group that shoot's flintlocks. But, after seeing all the fun, that we were having, a few cap lock guys wanted to join in. As long as they are traditional firearms, we are okay with that. Sometimes we even allow a Sharps or Trapdoor, just for show and tell, as long as they shoot Black Powder.
I rarely see a flintlock, outside of our club. Except for antique rifles, it's rare to see a flintlock, in any local gun shops. Most of the antiques, are just for display, and not for sale.
Our club is pretty much in to the flintlocks, and I started the whole thing, with a Tip Curtis, flintlock rifle. We now have more than 20 flintlock rifles and growing.
The flintlock group, draws more shooters, than any other club shooting group.