I both love this and am horrified. It looks like it'd turn a Pro Max into a 9 inch tall phone. Since it's a case, you'd need a new one each phone upgrade. (I used to do this with the Apple battery cases, until I came to my senses and/or magsafe.) Although, I still occasionally long for the blind accuracy of the old Blackberry keyboard. I think I'd prefer an adjustable magsafe attached keyboard that can do either land…
I wonder if a magsafe secured, size agnostic version could be made. Less locked in but easier to split across pockets and possibly works for more than one model.
But also.... no, I don't think I need/want this. But a cool design exercise.