Mhhh... good question!
Eng. Kemper stated that there's plenty of CPU power margin, but this might mean nothing of course.
Personally, in case such limit existed, I wouldn't dislike a resource meter like in the Axe-Fx (I know, it's not gonna happen), where the user is free to engage even power-demanding fx within the available resources limit: this would give more flexibility than simply not having a certain effect available at all.
I'm not one searching for the "all in one" solution, but since Kemper have designed to include fx in the KPA, I'd love them to be as flexible and powerful as possible