And pretty much all of Eastern Asia also uses YYYY-MM-DD.
Nevertheless, the idea is that YYYY-MM-DD can be understood and not misinterpreted by anyone except for, in my experience, some old fogey Americans that are still fighting any war that started over 50 years ago.
Also, when you sort YYYY-MM-DD into alphabetical order, it results in the dates being sorted chronologically.
Lastly, since SVP releases are hardly what one would consider frequent, the year is definitely the most important aspect of the date in our case.
Personally, I find YYYY-MM-DD to make the most sense since our number system as a whole puts the largest values at the left-most and the smallest value at the right-most; this numerical arrangement is even used for time.