My mind also went to seeing throngs of people fumbling with phones at the park entrance
There's also a discussion about MBs going on on the AP FB page today. Lots of confusion about whether there simply won't be any free MBs anymore, or if MBs are being phased out altogether (and then complaints about not wanting to use phones for everything) - so not unlike the discussion here. I've also read several comments saying they like MaxPass but hate taking their phones out all the time, and/or are DL regulars who went to WDW and loved MBs.
Someone did complain that they are "so sick and tired of going to the parks since Covid" bc they're repeatedly told to use the app (MDE) to preorder food, but then "when you ask a cast member how or where to go in the $&@$ thing they can't help you." By FAR, the area where we saw the most guest frustration a couple weeks ago was outside Pecos, closely followed by the areas outside other QS (and sit down) restaurants. Lots of frustrated people who didn't like the idea of scanning QR codes (several didn't work), didn't want to have to preorder food on their phones, said they didn't have/won't download any app,... The poor CMs outside Pecos especially were being yelled at and generally treated poorly. I can't imagine that if MBs are phased out entirely and there's a greater focus on using an app for everything, things would be any better. Hopefully whoever makes the decisions considers guest satisfaction and the effects on the poor CMs as a result.