There is a UFS-II specification and even a PCIe version specifically for micro SD cards. It was all planned out, and it would have been trivial to tell consumers: "Yo need card with more contacts as shown in picture". But no, the biggest manufacturer of flash storage is samsung, and they decided they'd rather sell higher storage capacity phones as a premium. Easy to do when you're the second biggest manufacturer of of phones and apple already paved the way.