ASIO Guard is a baffling thing. There was clearly an opportunity to do something like Logic’s hybrid buffering that works incredibly well, but Cubase’s version doesn’t even support multitimbral instruments, and regardless it seems to cause performance issues with supported plugins. Goes in the same “so close, yet so far” category with the new instrument track. Steinberg has an opportunity here with both features to do a truly cool thing, but unfortunately it’s going to take some more time to truly get there.