Saying that mastodon is "losing" to twitter or has "failed" to break into the mainstream is like saying that kids playing basketball in the street are "losing" to pro hockey teams, or that a 5th grade chess club in Japan has "failed" to break into American pro baseball.
Buddy, these things are not remotely the same. Mastodon exists in an entirely separate universe from Twitter. Mastodon is an *explicit rejection* of mainstream social media. We can't lose because we were never playing.