I get the impression that just about every inhabited spot on earth has access to just about every religion on earth. If a place has internet access (and satellite internet connections are possible) that's pretty much assured.
My speculation is that this religious globalization is creating a situation that's unprecedented in human history. Everyone has more and more access to everyone else. With population movements surging all around the world, it's increasingly common for people to have members of different religions as neighbors. Even when that's not the case, those others are just a few key clicks away.
So the old-style one-to-one correlations between social community and religous tradition are rapidly breaking down. What appears to be replacing that homogeneity is kind of an individualistic religious supermarket, where every religious tradition on earth has its wares laid out for religion consumers to place in their shopping carts. It's more and more common to encounter religious seekers who try out a variety of faiths before settling on one, or before they eventually evolve their own unique personal spirituality. And obviously, more and more people feel free to just shrug their shoulders at the whole thing and live secular lives.