Along with @__nate__, I have a new article out, called "After Twitter":
https://journals.sagepub.com/doi/10.1177/20563051251366907
The article is #openAccess and is our analysis of the fragmentation, polarization, and protective connections we're seeing across a major portion of social media. We also consider toxic nostalgia for the old Twitter versus critical reflection on the past that gives rise to better #alternativeSocialMedia.