Apple Vision Pro is a different beast because AR/VR don’t have product-market fit yet besides a few game genres that Apple doesn’t care about.
Apple is good at improving existing product categories less so at finding product-market fit that usually outsources to others.
From a management perspective, how do they handle the people side of that - keeping good people on the team and keeping them motivated to do something extraordinary?
People don't like spending time on unsuccessful projects and don't want their names associated with them, and don't want to work extra hard on something that won't come to fruition.
Maybe Apple management has enough internal reputation that employees are willing to take that risk (but even Apple management has flops - the car seeming to be a recent example). But that doesn't feel like a sufficient explanation to me.
Getting people to see that in forseight when they aren't seeing results, they won't for years, and it's all uncertain that it all won't be a waste of time, and it's frustrating and they have other, more certain offers - that's difficult leadership and management, and I wonder how Apple does it.