I ran into a recording of a young accordionist some weeks ago.
He plays Vivaldi, Bach and Scarlatti on accordion.
For me accordion is only an instrument for folkmusic, so I was very suprised.
But the question is: Is it good or just tasteless??
I adore the free-reed of the accordion, bandoneón, concertina, harmonica, reed organ, and the greatest of them all, the harmonium d'art (Kunstharmonium).
Karg-Elert, Dvorák, Bizet, Rossini, Franck, Guilmant, Schönberg, Lemmens, et al., all wrote for the harmonium.
A talented accordion player Mr. Andersson is. The accordion is a truly versatile instrument, and I dream of learning it someday. I've already gone quite far with the piano and violin, so playing an accordion would be really nice.