@atomicpoet I think Mastodon (well, I really mean the fediverse) doesn't have rivals. Sure, there's financially movitated stuff that is similar, but it's not a competition for the fediverse. I believe (hope) the fediverse will continue in some form regardless of whether *new app x* becomes popular or not.
I mean, iirc is still popular yet it still has, in this context, "rivals"