I agree with the sentiment, when things get too popular every sub becomes more generic and filled with recycled or low effort content. But there's a happy medium. It would be nice if there were enough people that some more niche communities had activity.
Personally I think growth is a tainted metric. For a capitalist enterprise focused on shareholder value it might be worth something (although you could argue that’s what turned the corporate Internet to shit in the first place). Steady ingress and egress of users is fine IMO. We don’t need growth, we just need stability.
It depends, without some growth in the beginning all the niche communities where one person keeps posting for month and others just consume this person will grow tired of being the only one posting. Then those smaller communities will die and we will have shrinking instead of stagnation. The big communities will grow and the users will get centralized. But overall the whole Threadyverse will shrink.
It's like when you have a conversation with someone and you are the only one carrying the conversation.
It's definitely slowed down, but that's fine, let it grow naturally. Personally I sometimes get put off because I end up seeing the same posts repeated across different instances so it can be harder to find content, but I also love the smaller community.
FediDB says Lemmy is steady. There are some interesting stats in there. There are about 44k monthly active users, which has been true for a while, and there was a huge influx of new instances shortly after Reddit Day, but most of them dropped off and the number of users per instance has been steadily climbing and the total active instances steadily falling.
Peak Lemmy users happened, it was in the later part of last year as a result of the reddit API controversy. No one expected that to stay, and users slowly waned after this as expected.
I'd say we're in a maintenance phase at the moment. Active users is somewhat steady, posts and comments are somewhat steady. There are around 45k active users, but note that Lemmy counts this different than other sites. For later Lemmy versions, you need to comment, post, or vote to be considered. Lurkers that don't vote (whether logged in or not) are not counted at all (for earlier Lemmy versions, voters are also not counted).
Growing more will probably happen after some other event to dive people away from reddit.
Other than reddit going for subscription or complete outage over some time I am not sure any event will cause another influx. A lot of people didn't care about the whole API drama, since they either never knew about 3rd party apps or just went back the official app. The official app might slowly get worse and worse but if it happens slow enough, these kind of users won't care.
There probably will be something. We may not be able to predict it. But reddit will pull a Digg or a Twitter at some point and people will be looking for alternatives. Then we get another surge of users.
Alternatively, one of the federated Lemmy alternatives (Sublinks, Mbin, Piefed) might hit the right audience and push up the platform userbase.
moderation policies that are very similar to reddit.
Or worse. Censorship and childish content warnings are rife. At least it's more transparent with built in mod logs but I wish there was at least some innovation beyond being just a federated reddit clone. Still nobody knows what an upvote means, same as reddit.