If Mastodon wins out in the long run the only reason will be persistence.
All these other “like Twitter but ______” micro blogging or whatever sites only stay viable while they’re profitable.
If Bluesky or Threads become (net) unprofitable, they’ll die. Mastodon is already unprofitable, so that can’t kill it.
I think we could compete with #1 just by word of mouth.
For #2 some person or group needs to develop a Mastodon app (FOSS obviously) that has a “just do this part for me” option, probably automatically enabled.
#3 is on us. We have to do what we can to make Mastodon (and Lemmy) more open and accepting without falling pretty to the paradox of tolerance.
#4 is hard… Although I think if Mastodon follows or tries to replicate the “early” Facebook user experience where most or all of the content people got was from people they follow, that could be better. The only challenge is that algorithms tickle our anger/hate/disgust impulses to drive and maintain engagement. That’s some very strong “lizard brain” stuff.