alt Hacker NewsAs someone who was once an avid twitter user, my sense is that Mastodon--after a somewhat hopeful start just never gained the network momentum. Bluesky came closest to Twitter's old reach but is still something of a shadow of the old Twitter (as Twitter/X is these days as well).
Bluesky is not just a shadow, it's on a pretty steady decline. Their DAU numbers are dropping every month. Which probably tells you something about the unspoken reason for this change.