Basically, Lemmy works by having a whole.bunch of different servers chitchat to each other. Hence how I can post a reply to you, even though you’re on Aussie.zone, and I’m on Lemmy.world.

The problem was that because Lemmy.world was big, and there were a lot of people in Aussie.zone who had feeds over there, Lemmy.world couldn’t fire stuff off quickly quickly enough.

Analogically, you’re basically getting a telegram to your house every day, saying what’s on the news. Except that there are a lot of people, so the telegraph operator can’t write and send the telegrams out quickly enough, and the message started backing up.

Lemmy.world basically enabled multi-threaded sending, which works like hiring more telegraph operators. While they could now keep up, there was still a huge amount of backlog that they had to send.

It’s only until this post that they finally caught up.