We all know that everything to do with mid-TOTL arrangers is purely subjective. The members of SZ are very vocal about their likes and dislikes, for sure. Whether Yamaha decides to market a 73,76 or 88 key version of their PSR arrangers is strictly their business. They seem to be doing just fine with their marketing strategy as it is.

Would they sell more product if they offered an optional bigger keyboard? I would think so, but then again how many of the larger boards would be bought at the expense of the 61 board? Maybe they see the cross marketing of sizes as a no-win situation, who knows. Yamaha certainly offers arrangers in larger sizes - YPG, Clavinova, Disclavier.

I might be interested in a 73/76-key Yamaha, but for now I am satisfied with my E-60 and see no need to go with a 61 Yamaha product. My comfort level is at the 6-octave range. Yamaha will do as it pleases until/unless economics force a change.