I find this to be incredibly interesting. It's like 2016 saw online polarization, but it happened on the same platforms. Today, there's a polarizations of platforms - we exist in different realities online.

I wonder if this split would have happened anyway, or if it was motivated by American politics. And I wonder what the consequences are.

It seems like a pretty fundamental development in how our information channels work, and I haven't seen it been discussed much by commentators.

Maybe my question cannot be answered because 'online' today just means something completely different than it did in 2016.