Posteo is in fact open source.

I’ve been using Mlem and it’s really good. Everyone else has mentioned Voyager so I’m gonna give that a try too.

As long as they keep all the historical stuff available.

I’m hoping people will leave when their favourite app no longer works on July 1. Maybe some of the app developers will move over to Lemmy.

This is fixed in the 0.18 release (the next release I believe) which removes live updates.

Source: the comments by the developers at the end of this issue

https://github.com/LemmyNet/lemmy-ui/issues/133