Anyone else excited about the 40mm pancake?

[Agilulfo]

Because sometimes you care about the quality of the blur when not completely wide open.

So, you want a large DOF, close the diaphragm, and also you are worried about the shape of the not so blurred circles. Surely there must be situations like this but I don't know if they are common enough to justify all this concern about the number of blades.