I find car driving annoying, where the only thing I can stimulate my mind with is low value podcasts. I have to divert my attention to anxiety producing driving in a town where people don't give a fuck about turn indicators or other safe driving practices.

In a train or an uber I can put on my noise cancelling headphones, sit, read and not have to focus on a road. If the train is full, I can still read standing up. It's like the standing desk :)