No franchise that has put 13 movies on cinema screens can be considered niche.
I mean, yes and no? Most of those films were middle-budget movies that did middle-budget business, and a couple just bombed. I think it wasn't niche in the sense of being obscure, but it also wasn't incredibly common either. It was something in-between.
Either way, I think post-2009, Star Trek has become much more mainstream than it was.