I just checked their demo, do they really completely ignore genres? I can neither find a node for music by genre, nor are they shown in the tables by default.
Oh, nice. Yeah, that ticket addresses the biggest (though not the only) part of genres I’m missing (and no, not just multi-genre). It looks like this part at least might soon get integrated.
As a general note, I find it fascinating that it could be something lagging so far behind, for me playing music is either via artist (maybe, as a secondary sort, album) or via genre, rarely anything else.