Washington Apple Pi in the mid 80’s. Had no idea that would be thought of as a ‘heyday’. I was in high school and used it mostly as a group of people to get software from...shareware and... otherwise.

There were also some fun bbs games like TradeWars 2000, of which nothing like that exists today. I remember racing home from school to see if there were still colonists left on Earth to take to my planets.