I find my mental powers and full concentration are required to keep the conveyance I am in from falling out of the sky/running off the rails/exploding in a ditch.

Generally, I sleep to avoid eye contact with strangers, or overhearing their inane conversations.

Also, electronic media feels impermanent

That's because it is. Most ebooks available today will be inaccessible media in ten years. Why people don't see this is beyond me. Perhaps, they simply do not care. I mean, who ever reads a Robin Cook book more than once.