Obviously if the HOME Arranger Kb market stays a bit steady due to previous Home wooden organ players trying to still enjoy the hobby of playing organ but now have benefits of using a arranger......The pro market for arranger & the OMB concept using them Decreases due to the younger crowd and their music 99% being Dj'd arrangers do still have a chance for longevity but has splintered and branched out to specific areas as mentioned. But I would have to say that Arranger KB's as a whole with world wide public acceptance not so much any more. That said I don't think they will ever totally die unless manufactures stop making them all together and players have to hold on to what ever units they can grab and stock pile them. The home organ market will keep them alive until they are gone in years to come and the younger set finds a new way of doing it.