If lots of motion in archival footage, you really don’t want double frames.
It’s 50% of your footage.
Thats what i think. Your severe ‘converting to 60’ problems.
Personally i would lean towards 720p30 because of this.
In a ProRes timeline.
Interviews in 60 P. Who’s idea was that 😛
Because there’s not much motion. 60P to 30P wouldn’t be much of a problem i think.