Cappelletti and Multi-Landy defenses to 1NT

I recently wrote an article comparing the Cappelletti and Multi-Landy defenses to One NoTrump. It is fairly clear that Multi Landy is far superior. Multi Landy has been in common use in Europe for decades – but not in the USA where the inferior Cappelletti is widely played. See the comments section below for the reason that Multi-Landy is not commom in the USA – It is apparently not sanctioned by the ACBL!!!