For the content creator class that needs to shoot/edit/upload daily, while minimizing staff, I can see definite advantages to having a setup which is both performant and mobile.
honestly half hour on plug every 4 hours of work sounds mobile enough to me.
I worked in the content creators business making videos, photos and music and frankly the need for 15 hours of battery is a (very cool indeed) glamorous IG fantasy.
In reality even when we were really on the move (I used to follow surfers on several isolated beaches in South Europe) the main problem were the phones' batteries - using them in hotspot mode seriously reduce their battery life - and we could always turn on the van's engine and use the generator to recharge electronic devices.
Post processing was done plugged to the generator.
Because it's better to sit comfortably to watch hours of footage or hundreds of pictures.
I can't imagine many other activities that are equally challenging for a mobile setup.
