I really, really didn't like the NI engine, and have been very pleased with all aspects of the ARIA engine--its stability, its interface, its licensing procedure, and its overall ease of use (particularly in Sonar). From time to time I read about new virtual instruments, and its seems that the overwhelming majority of them are released on the NI engine. Maybe there's no good answer to this question, but why aren't designers licensing the ARIA engine instead? Does ARIA have an exclusive deal with Garritan, or is it simply that designers aren't aware there's a better engine available?
If the latter, is there anything we users can do to help promote ARIA to software designers?