Well I don’t think that anyone is suggesting to start playing clarinets, side blown, to play in en ensemble ( by the way, have you read the thread on the upside down clarinet embouchure?) but it can be useful a technique for those who look for a particular effect ( to be used, for example, in movie's soundtracks) or to familiarize oneself with the side blown flutes (there are many but few are available in western countries, I had to look for them seriously, in Tunisia, wasn’t easy to find them).
By the way look into the kavala.
Of course, what this could achieve is that someone would develop a ney with mechanics.