Analytics are to blame for the change in style of the game and the erosion of the mid-range game, but so has the decrease of the quality big man. Big players aren't being taught the inside game at the AAU and high school levels any more. Big guys are expected to develop their outside games and dribbling ability much more and their post game footwork and post game shooting much less. No one is taught how to box out anymore, its all about using your athleticism to jump over guys to get rebounds.
As for the pick and roll, pick and pop game, its no more prevalent than decades ago its just being done farther from the basket. Also, screens off ball to open up three point shooters and cuts to open areas for passes to do easy cuts and alley oops are seen more. What I also notice being different in the game are designed passes cross court to weak side open shooters. That sedom happened before 2000.
Three pointers and layups are just more efficient offense than mid range jumpers and dumping it into big men that have bad footwork and bad post games. My guess is if we see some Shaq and Duncan type players come into the game, those teams with those players will change away to a hybrid post game/ball movement in and out/three pointer game we saw San Antonio playing for so long.