You seem to be repeating that SVOTI is a slow and rigid solution. My impression is different though: It performs as good or better than any of the dynamic GI solutions that UE4 currently has, and is actually more versatile. But I’m not saying “UE4 needs SVOTI”, rather that the current status of dynamic GI in UE4 is unsatisfactory. There are several solutions which seem to be half-ready, and current work on GI is on hold.