Jed Hresko recounts an experience on the Orange Line today, involving a poor lady in a wheelchair who just wanted to get off the train:
The front-most doors would only open half-way thus the lady in the wheelchair couldn't get out at her stop. She either spoke very little English or had developmental issues so she was sorta shrieking. She rolled to the next doorway... same problem! (i.e only one door of the two would open).
Then, we (passengers) blocked the other doors from closing, got the driver's attention while the lady wheeled to the last set of doors and was able to get off.
When the T finally extends the Orange Line to the Promised Land and we actually get those new cars, this should become just a sad reminder of the past, because the doors are wider, wide enough she would be able to get out even if one didn't open, but they will be more likely to open because they use a different mechanism than the current ones, which date to the days when people actually still paneled their rec rooms with the sort of fake wood Orange Line trains still sport.