Back in the 80s the trains still had guard's vans. When you've stood in the middle of a crammed, unlit, violently shaking box with nothing for anyone to hang on to, a place in the aisle seems like luxury! On the other hand, the intercity seats were more comfortable in those days, the windows opened and you didn't have to wait for the train to stop before you got off.
Yeah. I went to school on the train and did that a couple of dozen times over seven years. Also remember being horrifyingly crammed into the corridor of a former first class carriage.