I will agree not having to keep track of passes is a big plus. I lost my Disney AP many months ago, but have never had a problem getting into the parks nor have I even bothered in getting a new pass.They are going to be trying a virtual line system at VB, aren't they? Which would require a band. I think after VB is open with their bands that they will start to move towards a band for all the parks and hotels. But I can see it slowly implemented. It just makes sense. The people who stay at WDW and then go to Universal see a huge tech downgrade when going to Universal. My friends said it was much more convenient at Disney because they didn't have to keep track of passes and stuff especially with the kids.
Lost my Universal one a few weeks ago and had to wait in line for an hour for a new one. As I local, I love MM+, but I can see why people wouldn't.