Yeah, Nanite removes the time and cost of creating LoD’s and optimized material instances, but at a performance cost. Games that lean heavily on nanite are forced to use DLSS/FSR for reasonable FPS.
Gray Zone Warfare is running nanite on, it seems, everything.
In general it runs like crap on high end PC’s. Constant stuttering, low FPS is the norm across the majority of feedback and complaints. 60FPS @1080p is what there recommended specs are targeting.