Great! Especially as they can do it with existing resources. That should put a stop to some of the whining we hear here about the issue. Though I'm sure people will find something else.
TTC frequently has all-door boarding on buses at busy stops. Even with 4 or 5 people, I've been lined up at the back door (in a line to the front door) with no one on the bus at all, and the driver opens the back door. I'm guessing they are less likely to do this outside a high school, but it's very common practice. Which does make me wonder how often you ride TTC.