Yes, the time has come. Saturday is the day that the Central Subway will see its first day of full, integrated operation with the rest of the Muni underground system and we're taking bets about how smoothly/terribly this will go.
Saturday is the soft opening of Muni's long-awaited, much-delayed Central Subway, with free weekend service beginning to just the four new stops on the new line. It's January when the big service changes begin.