Though some of these players are superb exponents of the art they are most certainly not the first.
Trad harp has been around for as long as the harmonica.
There have been many debates and modifications to the design esp of the Chromatic and Modal button models.
It has been my experience with Hohner that they have their ideas about how it should be done and to hell with common sense. Mr Power for example has his system, Clarke his etc
Common sense and practice( Accordion/Concertina method ) shows that the correct method is placing a D plate into the C# instrument ( which OC nobody makes) and playing it from the inside out.
In effect you play with the button in and go out for the off notes taken OC from a C# scale; the reason for this set up is timing not convenience.
Other options are to take a D harmonica rip out both plates, put the D on the inside and rip up a C# to get the outside. Again Hohner simply refuse to do this.
I once had 9 270’s bought a blown out over the years which are lying about someplace ( I used love playing trad on the Harmonica )
Today a young player might be able to convince these Japanese wannabe makers to create the Irtrad Harp as outlined above. I often tought that what I did in bars years ago was copied a little but what audiences did not get is that I was actually playing IN Eb on the D 270.
Today I use only a cheapo sale ( 7 bucks …I am afraid I have the Harmonica equivalent of WHOA) Hohner blues Diatonic with the wrong notes in the lower octave ( if you ever played one you’ll know what I’m on about otherwise ignore the comment ). It sounds very nice with TW - but OC you probably did know that. Back in Ireland esp on the ‘Randay’ you’d hear little bands of TW Harmonica and Tamborine - rare these days I think that it is a dying art.
The Murpheys have that about their playing but the likes of Michael Conroy (WW2 vet) has never been equaled. The man could outplay the Uilleann pipers of the day! on a little Koch Hohner harmonica, absolutely incredible to hear it live
It is not an alternative to the Concertina - except for a masochist - because it is infinitely easier to take reels out with a belllows instead of yer lungs.
The only advantage I used find is that people are so surprised by the sound of it they can never get enough nor forget the event where they hear it. You’ll often hear them say ’ your’e the the guy with that plays the Irish harmonica’.
That said the original question is probably asking about Poteen.. lol