EMS-UL for the single use completed

“Does the EMS-UL/UM make focus on the OTA of “*****”?” is still the FAQ (Frequently Asked Questions) even today.
Stop to think of it, more than 33 years has past since I had announced the release of the EMS.
Why don’t they ask the OTA makers if the OTA has the enough back-focus for EMS?
How about telling the dealer or the maker of the OTA, “I would not buy the OTA that does not accept EMS!” ?