They wouldn't be hand checking jump shooters as much as the reverse. The match up would always come down to which era's rules as both teams are designed for that era obviously and would win.
I watched our championship games not long ago and the hand checking and the pushing on rebounds not being called stood out the most. Also the odd stare down not getting a T was good as well.
Hand checking stopped people from getting to the basket. That was what I saw as it's biggest use.
A lot of shots Curry/Thompson took were off screen catch and shoots. Hand checking doesn't really effect that much.