I have had a very hard time trusting Sony since the removal of the OtherOS/Linux support on the PS3 (which was not their first hard-line opposition to owner control that came to my attention by then). Since then, I have tried to avoid even simple Sony wares (headphones, etc) - even if the hardware was sexy - on the theory that they were the sort of company that would sue the sort of person I consider myself to be (specifically, someone who is likely to hack any phone or game system I buy).
Maybe others feel that way too. I don't know how much that would matter to the average phone user, but it might uniquely matter to the sort of people who are looking for an open boot process.