I would say that it's a necessity for dance/club tracks as they're meant to be mixed/edited on the fly by the DJ and listening to a 7+ minute track in full on the radio/Spotify wouldn't be ideal. On occasion when I'm up for it, I'll 'listen' to tracks by mixing them for myself for an hour or three and see what interesting transitions/mashups might arise. I've thought about getting a Reloop Ready (which is barely wider than a a 14" Macbook) specifically for personal travel use.