I just stumbled over this link: https://www.lego.com/en-in/careers/job/60134937
Looks like Lego is going to develop a unified firmware called Play OS which I would highly appreciate.
It will hopefully support the current Powered Up devices / hubs. The development of Play OS might also be the reason why there hasn‘t been an update released for the Powered Up app for quite some time. There are still quite a view promised features not released yet (VM, support for large hub, …).
Does anyone know more about it?