The higher the amps, the thicker and heavier the cables need to be, also the more they're worth stealing for the copper.
In addition, there is the question whether a home can easily accommodate a 80A charger.
Lots of homes (mine included) have 100A service. Here's a typical calculation of electrical service needs for a 2000 sq ft home:
If we add a 32A EV charger, we'll be pushing that a bit, but it's probably still the case we won't actually run up against the 100A service limit.
But if we have a charger than can deliver 80A, it's pretty clear that it's not going to work well in a house with 100A service.
For a business, they might have more amps available than a typical home, but there is still the question of whether, say, a 300A circuit is best spent on three 80A chargers, or eight 30A chargers.