Upvoted because I appreciate the exposure for this dating method, but I personally use it for everything. Much clearer for a lot of reasons IMO. Biggest to smallest pretty much always makes the most sense.
I do too, even in notes at work or handwritten stuff at home. I don’t always need to be reminded of the year first, but sometimes it becomes important on older stuff.
Plus when you’re in the US and work with people from Europe, the unambiguous ordering of month and day is a nice safeguard against silly misunderstandings.