The benefit of use high-end cameras (like those from Arri) is that they usually have a higher range for ISO (light sensitivity) and aperture, which makes it easier to shoot without setting up lighting for every specific shot. Most people know this from smartphone cameras: Cheap ones struggle in low-light settings while better ones will still be able to produce decent pictures.
The porn film industry is known for using the best and newest tech. Hell, If I owned a startup that was launching a new video format or camera, I would immediately send free or cheap equipment to major porn producers. Porn can make or break new tech.
I think that is true, actually. The porn industry adopts new tech early and eagerly, that is very true. But they simply don't have the budget for the best tech.
True. I forget times have changed and we are now in the OnlyFans era where everything is recorded on phones. I was thinking about the VHS/Beta wars when VHS was simply cheaper and easier to distribute in higher volumes.
Hell, there are probably only a few major porn producers these days and those are probably ran under a franchise model, of sorts. I am just speculating at this point though...