The last major holdouts in the protest against Reddit’s API pricing relented, abandoning the so-called “John Oliver rules” which only allowed posts featuring the TV host. It's the official end of the battle. The Reddit protest is over, and Reddit won.
Platforms don't rise and fall in a single day. Reddit used to be obscure. The fewer people go and make content there and instead just post her, the more Reddit dies through attrition. And as more active users are on Lemmy, the more it grows.
Lemmy has already hit critical mass to sustain itself so from here on out it will only grow. It surpassed the danger zone where engagement wouldn't be enough to bring people back. On top of that, the best lemmy clients already blow Reddit's official client out of the water. Now all that needs to happen is for more communities to grow.
General submissions have tons of comments, so there are actual discussions going on, motivating users to check back often. Also (at least for now), the discussions have less noise.
Content-based subreddits (like instantkarma, holdmyfries) where there is minimal discussion can be easily replicated with a bot, until organic submissions reach a critical mass.
That leaves community based subreddits, but when Reddit aggravates the community leaders they can easily move (like piracy did).