I've always been under the impression that, like some computer components (e.g., hard drives), failures are often most common very early in the life of a vehicle (owing to manufacturing defects or deficiencies) or late in the life of a vehicle (after usual wear-and-tear). In other words, the failure rate is essentially bimodal. I have no idea if this extends to vehicle components like transmissions, but I don't see why it wouldn't. Are there other reasons why you'd walk away from your Odyssey? The transmission is covered under warranty, so it shouldn't cost you anything other than time and convenience (which, as you know, may not be trivial costs).