Probably the reason it's a little hard to break away from the album format completely is, if you're getting a band together in the studio, it makes financial sense to do more than one song at a time. And it makes more sense, if you're going to all the effort of performing and doing whatever else, if there's a kind of bundle.
The physical sensation of gliding with the wind in your face is exhilarating. That automatic activity of pedalling, when you have to be awake but not think too much, allows you to let subconscious thoughts bubble up, and things seem to just sort themselves out. And the adrenaline wakes you up if you weren't properly alert.
I've been asking myself: 'Why put together these things - CDs, albums?' The answer I came up with is, well, sometimes it's artistically viable. It's not just a random collection of songs. Sometimes the songs have a common thread, even if it's not obvious or even conscious on the artists' part.