It will outlast bs. Mastodon has been around for many years now. It already outlasted Google+, which was bigger and had more funding. And since it has a broad base of support it's unlikely that it will all just fall apart. Unlike the commercial social networks, no single person can pull the plug the fediverse. (Lemmy is younger, but it also seems very strong right now. I just hope lemmy still gets some exposure on the outside now that the major drama at reddit has died down.)