If you really want to get to the heart of the matter: "After Thiel resigned following a rift over Musk pushing for the PayPal system to go on a Microsoft platf

If you really want to get to the heart of the matter: "After Thiel resigned following a rift over Musk pushing for the PayPal system to go on a Microsoft platform instead of Unix-based software, Musk wanted to broaden the company's ambitions as more than just a money-transfer service by making the letter X more prominent in its branding and phasing out the PayPal name ..."