Seems like an interesting effort. A developer is building an alternative Java-based backend to Lemmy’s Rust-based one, with the goal of building in a handful of different features. The dev is looking at using this compatibility to migrate their instance over to the new platform, while allowing the community to use their apps of choice.
Yeah this sounds like someone doesn’t know rust and instead of learning it they’re porting to Java? It might also be a way to capture an existing userbase as it’s still compatible with lemmy, but also adds features that might cause more people to use it. But being written in Java is an excuse to make it more difficult to migrate the additions back upstream to lemmy. Maybe they hope that this will eventually allow them to build out a private platform?