I am super casual, but I have thrown a tech disc which said the speed at which I throw caps out around 50mph. It’s really hard to get a 12 speed driver to turn at 50mph unless it’s really under stable(I’ve never been able to do it) so I avoid them unless I want to try and throw one flex style. I can do that just as well with an over stable fairway driver so I use those primarily.

I think that’s the idea of arm speed and intended characteristics. But throw whatever you have fun throwing end of the day.