The posting of this video serves as a reminder of my age/experience.

My first year of officiating was in the 1980-81 season.
Where to start? There are differences all over the place - bird dogging, fouler raises hand, T administers the FT, L pinches the paint near the end line, collared shirts, coaches sit, long switches, and offenses that work for the open mid-range jump shot.
Ahh, I remember when!