As with the tenor-recorder/English-flute, Woody, when one plays a tune on the chromatic baritone English concertina (which I still think has a nice homely timbre) they are playing the very tune/top-line melody on the score - which, if also a singer, they can, of course, readily match with their voice. I also like the Anglo, but it is not fully chromatic and, with it's push-pull system, is more likely to develop holes and the associated gushing sounds that slightly spoil the timbre.

What a load of codswallop. For someone who claims a degree in humanities, WAV you are remarkably inarticulate.

To address some of the points.

I play recorder and regularly play in parts so don't always play melody.

Both English and Anglo concertinas can be played chordally - but that is anathema to WAV's world view.

A 30 (or more) button anglo concertina is fully chromatic and is capable of playing in any key - though the more remote keys are not always easy. The last part of your statement about the anglo is utter nonsense.

By the way, you need to do an awful lot of practice before you are even competent on the recorder. Your playing is dreadful. You need to work on timing, breath control and phrasing if you want to be taken seriously. An awful lot of practice is needed.