Making a tight connection from old A to C was not good. The time I ran from A to C on bus ran to my gate like C122 for SJU and door closed 8 minutes before departure.
I asked the agent don’t you look for connections they don’t do that anymore. Had to get to JFK at my own expense and took DL to SJU.
Was in DFW a few weeks ago saw them close the door 10 minutes before departure people who were trying to get on were out of luck.