Lemmy’s biggest competitor at this point isn’t reddit, it’s Discord, or rather, the monster it has become. It seems to me that instead of creating a subreddit nowadays, every project now wants to use a Discord server for everything.
The problem with that is:
Asking messages in a big, open chatroom (over, say, 20 people) gets real messy, real quickly.
Conversations on Discord are difficult to follow when multiple of them are going at once.
The conversations containing solutions to problems in chat or threads are not search indexable, which is the reason why reddit became quietly dominant in search results, it is simply the biggest centralized repository of organized English language text conversations available.
So why do people insist on using Discord servers to build their community? Simple, it’s the network effect. If somebody wants tech support, it’s way easier to click a Discord invite on an account for group chat you already have than it is to sign up for yet another forum that you only use once. But Lemmy doesn’t suffer from that problem of traditional forums because of federation.
Which brings me to my point, if Lemmy is to grow, it’s better to sell Lemmy to disgruntled Discord admins and forum owners to move their community than it is to get people to move off reddit at this point, since people who wants to leave reddit has all done so at this point.