How hard could it be to code the storing and recalling of
-All Items with their properties, position, gain, length etc
-All Automation curves
-Maybe also Everything regarding item FX
I am only a noob, but i imagine it has a lot of "doing stuff over and over for each item and automation" in it. I bet it´ll take a few secs...
That way we could flip between different arrangements without affecting tracks and mixer of the Song.
A real developer would maybe even give us gimmicks like showing arrangements next to each other (arrangement-split-screen) - of course you can drop the play and edit cursor on both of them
I immagine saving item FX with each arrangement might be very handy if you use it accordingly.