Replay is of value as no man is perfect....however, if an electronic strike zone is instituted with strikes and balls being called by some computer...well, just sign me out and I'll stick with hockey.
On the ice, the officials review to see if a skate blade is or is not in contact with the blue line for an onside/offside has caused too many stoppages and recalling of good goals with the new rule. It will be (at least I hope it will) reversed by the owners for the 2020 season.
Keep the game moving; the speed of it is one of it's defining and basic characteristics,
Back to baseball...super, super, slo-motion explains the physics of it all. Beautiful sphere meets solid wood and a projectile is launched.