There have been a couple posts lately debating whether or not the OSR is dead (because reasons.) I will only link to this one at The 3 Toadstools, not only because I agree with the basic point, but also because it links to several other posts, so I don't have to do it myself.
One of the things people on both sides say is that the OSR is splintered. But I'm going to ask: Is it, really?
The core OSR experience is to revive old school D&D and some of its practices. Few people who were involved with that have stopped playing old school games. They are doing what they always did. Are they a unified community? Well, no, but they never were. There were always some people who didn't talk to each other. Hell, I left Dragonsfoot more or less because of a handful of people who dominated those forums and made the conversations unpleasant, one example being when they started insulting Isaac Bonewits after he died, because ... they were good Christians, I guess? That was one year after I started this blog.
So there's really no more splintering than there was at the beginning. What may be confusing people is that there's a whole extra set of people that weren't part of the OSR back then. These are the people who think of the OSR as being edgy, DIY, light mechanics RPGs. They aren't really interested in old school D&D at all. We could debate whether they are really OSR, but the point is: there are at least twice as many people who identify as (or are linked to) the OSR as there were originally, and there is a sharp divide in their interests.
It's not because one faction has split away from the other. It's because a new faction has joined.
Perhaps it's a bad alliance. Perhaps the two factions will never get along. But the point is, the OSR has expanded as a result, not splintered.