One of the problems with a company giving away their plans to make a new better version of something is that it tends to cause people who would have purchased the current product to wait which sort of dries up R&D funding. I am sure that MRT is still selling 216-219 dog collars to people who like them. Probably not as many as before Garmin and others introduced the GPS collars
but I doubt that the orders have totally dried up. We have agreed at my company to NEVER discuss new products before they are ready to take orders unless they are so different from current products as to be no threat to sales.