Graven: an indie Ultima Underworld that...doesn't go anywhere?

Time for a classic 3DR delay: Graven’s first early access content update, which was supposed to release this summer, has been pushed back to Q1 2022 (the original launch date for the full game) as announced in this lengthy trailer that shows off some of the new biomes you’ll get to explore in a few months.

The said on Discord that the roadmap will be revised:

EDIT: Just after I posted, they updated the Steam page with an announcement and a new roadmap.