When you start a greenfield project, there will be parts of your code that you write and will never need to modify again.
It's weird, and I don't think this phenomenon really occurs in established projects.
It's fascinating how podcasts have become a thriving indie phenomenon. They're easy to create, require no special equipment, and easy to distribute. What other fields have an appetite for diverse content with little post-production polish?
I've seen an interesting phenomenon where people watch videos on their phone even when sitting in a room with a TV.
I sometimes do it and I've met others who do it.
I think it's a partly habit. You pull out your phone in lots of environments which don't have a larger screen.