You haven’t addressed for me the most obvious distinction:

“My” or no label for technology that I own (or that I should fully own as I have paid for it, this concept being currently eroded). “My Computer” as the perfect example. But also MY playlist, MY movies, MY Apps,… if I have paid and purchased them.

“Your” or “Our” for technology or services that do not belong to me. “Our” on the head of the banking website is appropriate, “My” for my accounts there. “Your” on services that do not belong to me but I use, say free Pandora account-”Your” radiostations…