You have to remember that any new proposed tram interchange at Waverley doesn’t just have the airport in mind — in fact it is probably a less important factor going forward, given Covid’s impact on the aviation industry. Waverley is the nearest major station for Leith and RIE/Southside, both of which will be served by future tram expansion.
The 100 will probably disappear once the buses and trams merge... unnecessary duplication is one of the main reasons for it. IMO, trams provide a more obvious and easy interchange than buses for your average person. Even if it is slower, a suitably located tram stop will almost always win out due to it being a permanent and high quality piece of infrastructure.
As for the stop at the airport... I believe that the plaza area between the terminal and the stop was left empty to allow future terminal expansion... which would bring the stop right to the door. We may be waiting a long while yet, given the circumstances.
The 100 will probably disappear once the buses and trams merge... unnecessary duplication is one of the main reasons for it. IMO, trams provide a more obvious and easy interchange than buses for your average person. Even if it is slower, a suitably located tram stop will almost always win out due to it being a permanent and high quality piece of infrastructure.
As for the stop at the airport... I believe that the plaza area between the terminal and the stop was left empty to allow future terminal expansion... which would bring the stop right to the door. We may be waiting a long while yet, given the circumstances.