Bolt created on grey layer jumps to beige 40 instances 3Mb why?

Think about it. It’s exceedingly rare to actually “need” real 3D threads. Even modern computers are easy to bog down with this level of detail while people have been doing this CAD thing since…the 70s. And people doing mechanical design who do a lot of fasteners usually need a LOT of fasteners. So no they generally don’t.