From Apple's point of view, Apple Vision (Pro) is the ultimate platform. That's why I think they were so convinced in developing it. If VR/AR headsets follow the same transition we had between the first gigantic mobile phones of thw 80s and the pocketable ones of the 2000s, I could seriously see Apple throwing out all their consumer lineup (phone, watch, ipad, macbook) and only have a Vision device. This would solve all the problems regarding different experiences.
We're still a long way before it being a viable option to ditch all other devices for. If they could get it working as an AR glasses wirelessly reliant on an iPhone then that would be the thing that makes it go from weird overpriced useless product to an actual useful device.
Getting rid of the phone completely though is a whole other issue and we're nowhere near being able to ship anything with enough computing power and battery capacity into a form factor as light as standard glasses.
The whole chunky VR headset thing - no, that's not taking off as a thing people will wear all day.
They obviously replaced it no problem but it highlighted they were either still mixing stock or were using a dodgy supplier themselves.