I highly doubt we’ll get pistons extending longer. We already have pretty compact flying machines that do the same thing, and super extendable pistons would just make those simpler rather than add many new capabilities I would think.

I want a huge minecart and rails rework to make them more useful. They’re so slow and useless compared to any other transportation methods for going long distances.

Concrete slabs

I’d love more mobs just to make the world feel more alive, even if they’re useless as well as multithreaded entity spawning and tracking for performance gains.

Crossplay between Java and Bedrock, GeyserMC made this, its not perfect but mojang is totally able to do it