This sounds like the whole “android will dominate because it has the larger market share” argument all over again, and we know how that went down.
Anecdotally, I am hearing of users who are getting more engagement on their posts despite having way fewer subscribers. The mood and tone over here at Mastodon is different (mainly because there are no ads and no timeline to manipulate). Ivory is great while Twitter decided to pull the plug on third party apps.
Maybe Mastodon will tank, and maybe it won’t. Either way, I intend to stick with it all the way.