Depends on how you define ridiculous. If it means 5 times the cost and not as good, well, that would be my point. Even if you have the best analog speaker in the world, it still will benefit dramatically from DEQX. I don't believe there's a speaker made that it can't make sound like costs 10 times as much as it does. Or, in the case of $50K and up speakers, finally make them sound like you'd expect for that much money.
Again, if it is just a focal point to show interesting expensive gear, that's one thing. If the focus is obtaining objectively the best sound possible, I don't see how you do that without DEQX as the main component in the system.