I have tested the CyclesX build and I am also very impressed, especially with the improved interactivity/update rate.
Only thing that caught me off guard is that there’s the same old UI/UX failure. The simplify bounces option was moved and renamed, which is good:
But there is absolutely no indication anywhere in the whole UI that it relies on Ambient Occlusion factor value, which is in completely different rollout in completely different properties tab (world). And nowhere in any of the Fast GI Approximation setting tooltips is there even any mention of the AO Factor value.
Why not make this its own separate thing, completely decoupled from AO?