My theory is : Its the way Cubase process audio, it’s an old engine originating from Nuendo 1 or 2 , and refined over the years .
More generally, I think it’s also the way computers work with audio.
Audio is a realtime thing so data needs to arrive fast and all “in time” . While other type of processing ( like
compressing a RAR file or decompress) dont need this so that type of processing can use all the cores processing available.
I know its annoying but I think Steinberg will need to reprogram its audio engine from scratch so it can uses all the amazing processing power we have noawadays , maybe for Cubase 8 ?