I can understand the argument about more developers knowing Java (right now) and the controversy of the current main lemmy devs.
However for maintainability, I really don’t see it. Java has the billion dollar mistake with null references, forces you into an object oriented programming style and uses exception-based error handling, which is far inferior to errors as sum types like in Rust.
Often when Rust compiles, it works. This is a big strength when maintaining a large system. You can’t say the same about Java.
Lastly, Java doesn’t seem… Future-proof if you can call it that. It’s certainly an older language and it’s not likely to keep getting bigger. Rust is still growing a lot and is being adopted extremely heavily by the largest technology companies. It’s not unreasonable to think that there will at some point be more Rust devs than Java devs. Though that day could still be a long way off, to be fair.