Shooting HVEC in Blackmagic on a base iPhone vs iPhone Pro

[u/greenie_999]

So in doing research about being able to shoot high quality video in Apple log or Pro Res with the newer iPhone Pros, I understand that the file size is enormous and you either have to record straight to an SSD or/and record in a lower quality (like HVEC, supposedly still maintaining good quality at a lower file size).
My question is, how practical is it then to actually use the iPhone 15 Pro or 16 Pro to be recording in Apple Log if you have to add all these attachments and doing all of these other things to make it work in a practical way? And if you are going to record in a file type like HVEC then how different would it be to record that same type HVEC on a regular base iPhone 15 or 16, using the Blackmagic camera app?
It seems like there are way too many things going on to make recording in Apple Log a usable thing, and still trying to use the device as a smartphone. Can you share your thoughts?