Shooting 80% of FTs as a team is extraordinarily rare. If there are more than 3 Division 1 teams who do so any given year it is a remarkable year. 70% has been the norm for 50+ years. It is a myth FT shooting is worse now than long ago.
It was slightly higher than the norm this year at 71.7%. The idea that they used to shoot them better in my day is a much repeated myth for sure.
The other thing with FT% is that it isn't well correlated with winning games.