It is simple to think that this format would work but the people who are not familiar with this format will be completely lost with it. People who are not educated but somehow learnt to follow one format; ask them to learn a new format; it will be so complicated.
Sigh...
You're not even from the United States, so you should full well know how important standardisation is across country borders. There are literally only three countries that haven't adopted metric, zero that haven't adopted the standard 24 hour / 60 minute day, and only four that haven't adopted the Gregorian calendar[1].
So why is it so hard to accept the one consistent date format? Seriously? Why?
Tell you what: If you can tell me which day the following date represents, I'll give you USD 100. Seriously. I'm not even kidding.
03/04/05
(1) standard probabilities apply.
But seriously, yes. I am French and write the date as 2009-03-01 and get weird looks.
I work in a French company and some people seem to assume that it is fancy to use a US format for the dates. I refuse to read a document which did not have an obvious format.
Heck, even MAR/01/2020 could be acceptable but why? Why?