In the 1984 Finals, the Celtics and Lakers combined, in seven games, to go 15 for 42 from three. That's 35.7% and roughly speaking the teams combining to go 2 for 6 in each game. Overall, they took 1,296 shots, or 185 per game (with two overtime periods).
In the 2017 Finals, the Cavs and Warriors combined, in six games, to go 137 for 359 from three. That's 38.1% and roughly speaking the teams combining to go 23 for 60 in each game. Overall, they took 906 shots, or 151 per game.
So no surprise, but the 84 teams played at a slightly faster pace than the 2017 teams but the current teams are more efficient with their possessions. Certainly the skill level of today's players is off the charts, but I do think the Warriors would struggle to guard Kareem, Magic and Worthy. Who's gonna guard Kareem? Draymond? Then Durant or Iguodala on Worthy with the other one taking Rambis. That leaves Curry and Thompson, and one of them has to check Magic? Child please. If they played West, Zaza and McGee more to help with Kareem, then one of the starters has to come off the court. I think they would have to do that or Kareem would destroy them with the skyhook. The Lakers are a decent matchup for the Warriors. Magic was tall enough to play off Curry to take away the drive, but still be able to close out on some of his long threes. Cooper/Scott on Thompson or Iguodala works. Worthy on Durant works. Rambis on Draymond would end in fisticuffs, and Kareem guards the rim while paying little attention to the crappy big in the game.
Lakers in 7