On the last few projects we had some issue that slowed down our Premiere projects massively but we didn't figure out what it was until we deactivated Clear and activated it again. Turns out the plugin, if used throughout the project, slows down the whole access time like e.g. the playback. The project becomes so slow, that it takes ruffly 10 sec until you can playback your timeline. If deactivated again, the project runs smooth again. The project was saved on a T7 2TB Samsung SSD with fast read and write speeds.