LukeP
I’m still not fully understanding what the APEX is and what current gaps in Houdini it’s trying to address.

Maybe something similar to Unreal Control Rig - where they have a dedicated lightweight VM for rig calculation.. in other words - dedicated rigging node graphs that execute very fast and are much easier to use than current SOPs based Kinefx rigging. .. Just a guess, but it would be cool as Unreals Control Rig IMHO currently is the best rigging framework out there.