I'm thinking about in-person gaming. It sounds like you're talking about finding folks online? If so, yeah, that's not too difficult for the majority of systems. But if you want to sit down at a table?
No, that won't happen regardless of what game we're talking about.
I'll give you some context. I like running a lot of public games; I like the community RPGs offer, I like meeting new people, screening new players, and such. So I play (well, run really) at the FLGS of whatever area I'm in. I move around a fair bit. Whether you're in a big city or a small one, its super easy to find a 5e game this way. Most shops have a regular community already, they have a warhorn or the like, you can jump in.
But even in the big cities (I mean LA), you can't do this for anything other than 5e. I see people come in and try to advertise their PbtA or Blades or Dune or OSR game, and they get very little interest.
I've been able to get those games running, but you need to know the players first. The most reliable way is to network with the community, playing 5e exclusively, for several months, and then offer to run something new.
In the small cities I've been in, it takes longer.