You write, “Transport Canada intends to require…” ADS-B transponders. But the Canadian Owners and Pilots Association (COPA) has been objecting that it is Nav Canada which is announcing the requirement. But NavCanada apparently does not have the authority to issue this kind of mandate, only Transport Canada does. Has that regulatory mismatch been cleared up? It seems like this would be a relevant part of the story to include.
For more on COPA’s advocacy about the ADS-B mandate, see copanational dot org /advocacy-updates/ , and search for “ADS-B MANDATE IN CANADA”. (Why can’t COPA have separate URLs for each advocacy issue? Sigh.)