Dutch²

The experts interviewed generally agree that competitive or serious recreational cyclists should aim for the stiffest shoe their budget will allow, but more casual riders will benefit from a less efficient, but more comfortable, shoe.

I remember seeing a foldable bike with cleat pedals IRL on the train once

You can't argue with aerodynamics and power transfer.

UCI had to outlaw these.

... could you send me a link to those I know a guy who would genuinely buy these.