I believe that started around Vista/7 and is a very telling sign of whose computer they really think it is now.

I understand this is (probably) a tongue-in-cheek comment, but the "My" prefix was infantile and terrible for scanning the alphabetically ordered list of folders ("My Documents", "My Music", "My Whatever"), so dropping this nonsense feels like a step in the right direction.

It still baffles me though how the Windows designers assumed it would be a great idea to bless me with a predefined "3D Objects" folder (right under "This PC"), which comes at the top of the list due to alphabetical ordering, and can't be removed. I wonder what percentage of users actually need this.

IIRC they introduced that one around 2012, when 3D printing was taking off and was thought to be the next big thing