Haven't used one since the iOS/iPadOS split, so honestly don't know how much more flexible they've become.
More familiar with iOS on iPhones though, but can't see how I'd do 'serious creative work' - which usually ends up involving large numbers of files that need keeping organised - on an OS that's traditionally tried so hard to hide the underlying file system from the end user.
And I've never tried connecting a camera or video capture device directly to an iOS device, so not sure what is or isn't possible in that area.