i use the SSD drive, makes no difference, subd is at lowest level, makes no difference: The UI slows down a lot and freezes poser after a while

My V4 injected with all morph sets loads a lot faster as genesis. Which is not surprising if you have saved it previously with external binaries active. This is what the DSON importer does as well when the poser cr2 is generated

As I said a single genesis figure is a bit slow but acceptable, but if you add more figures to your scene it gets a lot worse and becomes unusable