After a few months of scuttlebutt, it's here!
https://www.quilterlabs.com/collections/bass-amplifiers/products/bass-block-v803
My first impression is they've learned some lessons about making a radical-ish amp. They've kept a few of their really unique radical ideas (I don't understand the implementation, but the power section sounds like something quite unique.) but they've made some things more palatable, or ordinary, like they EQ section. I hope this sells well. I love my 800.