We are talikng about a very niche product, used by a microscopic portion of the public, communicating to many different systems that are in the process of migrating away from a system based on 1960s technology into a system designed in circa 2010.

Nature abors a vaccum so if there was a reasonable market, someone would likey have presented a newer and better version, I doubt Google Flights would build anything like that, so likely some of the many Airline IT tech savy people on here might take a shot at it and offer something homemade for people to use. Outside of that, I think EF will be put into the 'remember that cool website we used to use?' file.