There's only a few communities I'd be interested in seeing come over and they've already made it clear they're not interested in moving because of reddits enshittification. I don't think lemmy should cater to people who can't be bothered to get over the small initial hump of choosing an instance. We don't need more users just for the sake of more users anyway. People like that aren't bringing anything to the table anyway.
Fediverse
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I mean, no? Are you all going to constantly screech at people for not hating capitalism? The people and their behavior are the problem.
The authoritarian tankies masquerading as leftists/progressives is a problem too.
Instance selection at sign-up remains the primary barrier to entry.
I think there needs to be a quick question form upon sign-up, going over the biggest differences between instances. Such as: "do you want downvotes activated? Do you want to see NSFW? Do you want little, moderate, or heavy automated blocking of potentially objectionable material?" etc, then have the sign-up page provide you with up to three instance options based on your selected preferences.
Otherwise you're either forcing users to do this research on their own ("ew, homework just to sign up for social media? no thanks") or they're going in blind and selecting at random, very likely ending up on an instance with qualities/features they don't like.
A separate issue: during the big 2023 rexit (when I moved over), the primary instance that most new users joined, lemmy.world, was a buggy, buggy mess, practically unusable for the first few days. I don't know if that was specifically because of the influx of new users or if it just worsened problems that had skated by when there were only a handful of users before, but I imagine the bugs turned away quite a few potential new Lemmings. Hopefully that won't be an issue this time around, but I guess that depends on how big the exodus is and how much Lemmy infra has strengthened in the 2.5 years since.
Maybe pushing Piefed instead of lemmy would be the way to go. Piefed has a more beginner friendly UI and makes it easier to find new communities
Eh, I'm probably leaving here after lemy.lol shuts down. Have fun!