Off-topic, but players will be well-served by learning to hit off machines. Current machines can be configured with the exact pitch arsenal of opposing pitchers. The Giants won 107 games in 2021 taking pre-game on-field BP off machines operating at game-speed with the arsenal of that game's pitchers. Several aging hitters had career years.
Just like analytics/sabermetrics revolutionized how players are evaluated, game-speed training will revolutionize how players practice. Game-speed training is a big part of Driveline's programming, and coaches like Donnie Ecker and Andrew Cresci are taking that programming to MLB. Old habits die especially hard in baseball, but it's only a matter of time before any team that can afford it will be using machines for much of their BP.