I would like to use formulas everywhere like for sizes, positions, etc. This is really useful for more dynamic interactive components. Let me explain with the Origami example below. The dot in the slider has a start position and an end position. When i update the slider layers (size, position, etc.), I would need to rewrite all the hard written values in the logic part (status quo in ProtoPie). Origami allows me to use layer information which are always up to date to connect them with my interaction logic. This would be a dream to have in ProtoPie, too. And the functionality is already there - formulas.