There are some Fediverse services which are incompatible or don’t work that perfectly with each other (e.g. Lemmy on Mastodon). So I was curious on why that could be a problem with ActivityPub compatible software in general. I mean, apparently just implementing ActivityPub may not be enough.

And if there are some Lemmy devs reading, what are some technical difficulties for Lemmy on that regard? Thank you for making this awesome piece of software btw!