Noice. To me, Gotham makes more sense because it depends on stable, whereas Rocket uses nightly. Anything depending on nightly seems inherently more fragile and un-future-proof (no pun intended).

I don't have any insight but you can subscribe to this issue to see how things are moving: https://github.com/SergioBenitez/Rocket/issues/1065

I've been following this quite closely. Most of the work seems to be done. But development is very stop-start in fits and bursts, so it's hard to tell how much longer it will take.