I joined during the first Reddit exodus, and it seemed like for ages the amount of Lemmy content was generally increasing (sometimes quickly, sometimes slowly, but overall increasing). Now it seems that when I sort by New, I get through everything since my last visit much more quickly than I used to. Is that my imagination, or is the activity declining?

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[–] 4Robato@lemmy.world 2 points 16 hours ago (1 children)

Yeah one has to be careful with statistics and I couldn't find the whole Lemmy in one place so it's also not representative of the whole Lemmy.

I thought ActivityPub did scale well and was ATProto (Bluesky) which had a lot more issues. I mean I can comment on Peertube using my Mastodon account meaning the whole Fediverse is properly connected and we are 1M MAU so I would say it already scaled good.

[–] squaresinger@lemmy.world 1 points 3 hours ago

Here's all of fediverse: https://lemmy.fediverse.observer/dailystats&days=1000

Also remember, though it says 'daily' in the title, that only refers to that the stats are grouped by day. They are still total numbers (e.g. total number of posts that are available on that day, not number of new posts created that day).

Lemmy has the big issue that each instance needs to cache the whole content of each community any user of that instance ever subscribed to. Since Reddit-style platforms only make sense if there are huge communities that means that the biggest communities have most of the traffic while being subscribed to by most instances. That means that most instances have copies of most content.

Same goes with moderation. Since every instance holds a copy of the content, each instance's operator is liable for illegal content stored on their server, and most instance operators also want their moderation guidelines enforced across the whole instance, even for content coming from other instances, so each instance needs to moderate all content. Content moderation on one instance is not propagated to other instances (unless the moderation happens on the host instance of the community), so you end up with moderators of dozens of instances each having to individually e.g. delete the same post.

This is already such a strain that e.g. Lemmy.ee got shut down because it was just so much work and money doing all of that, and that's with a miniscule amount of ~40k monthly active users across all of Lemmy. Compare that to the 1.2 billion monthly active users on Reddit. If we only got a tenth of a percent of all Reddit users over to Lemmy, the whole system would come crashing down.