more expensive imo.
actually the same pins (well one of them , though since the connector is rotationally symmetric you need two anyway) are used for USB Power Delivery and to negotiate what speed regime to operate in .
furthermore , USB On the go , which was introduced in USB 2.0 , offers the same functionality for USB Micro and USB Mini
it seems like it , but I have no idea !
edit : to clarify , I believe it does , using the CC1 & CC2 pins which are also used for other things , but I don’t know anything about USB protocol side , I should learn about it haha