Agree! Sort-of.
When it came time to spend even more money for my WDW trip, I opted out of buying MBs for the family. We chose to use a card on a lanyard instead. Functionally, it was the same as a magic band, but it was free (I already had lanyards from various conferences). Anyway, like you said, this is FAR SUPERIOR to pulling out my phone for every LL or the entrance gates. I really liked the functionality of just tapping under the photo to get ride photos also. So much nicer.
Speaking of entry into parks.... Disneyland needs to UP ITS GAME AT SECURITY! I know that's a topic we've talked to death around here, but it was so apparent to us when we didn't have to wait AT ALL in WDW to enter the parks.