Of course everybody is free to do (or like) whatever with any kind of audio gear; there are just too few B-2 around for such a piece of audio heritage that I prefer to see them as their creator meant it.
I love black Sony ES series with wooden sides, but Yamaha deliberately designed the B-series as all-square black metallic technology as a firm modernity design statement. Putting wooden sides on it is a (virtual) insult to the intended design statement, not understanding/recognising what this design and technology is all about. But, whatever one likes, I guess.