There has been a similar historic precednet in the US with automobiles. There currently is no US car line at the Mercedes-Benz S-Klasse price level; There was int he 1920s-1930s: Cadillac , Packard, Lincoln, for three, were premium-level, expensive cars. All three had to start making more mass-produced, lower level cars, which would sell in higher volumes if the manufacturers were to survive. Packard made first the 120, then even a six-cylinder car, the 110, to offer the public a "real" Packard at a lower price. Lincoln made the Zephyr which owed a lot more to Ford's technology and manufacturing methods than to Lincoln; Cadillac came out with the LaSalle and the 60 Special, and gradually moved to a higher-volume, less exclusive and lower-priced product.
Post WWII, the Buick Special was the same thing: a "real" Buick which was built with a Chevrolet body shell restyled and with a Buick engine. Of course, even Mercedes-Benz came out with the 190 Series and continues with the C-Klasse.
Bottom line: if the money is not coming in the door in sufficient quantity to amortize engineering and other overhead, and buy materials and pay wages, and pay the cost of capital, its Game Over for anyone, no matter how "great". Yamaha can learn a lot from B.; B can probably learn a lot from Y and will benefit from having enough capital to fund some engineering and design, and maybe get their volumes up a little to lower their unit cost. Hopefully the result will be higher quality for everyone.