Why hasn´t an air bridge been realised yet?

I´m just wondering---course I don´t see a real reason why Pelikans are in PA but no orders to construct an air bridge! I defintly wanna have such a thing. It would be a great alternitive to telepoters on island-maps, it would be great on giant planets in general and could be set up to reduce the APM needed to do some incredible stunts in general. To put it simple:
It would be awesome!

By "air bridge" do you mean transport ferry ai? As in set a load and unload location for a number of transports and watch as units are ferried continuously? Definitely a nice option, one we had in spring and sup com. Only thing is air transport needs to be t1 again to make it worthwhile (as otherwise you may as well build a gate).

Do you mean a literal bridge that you click and drag to a destination and fabbers build it and unit just ignore all terrain and go?

Of course I do not mean the literal bridge...

Yep, you´re right. But I´d even enjoy it without pelikans becoming Tier I, although I´d appreciate such a step!

technical reasons and ai stuff ...

Would be cool to see in the game since both vehicles and bots have/can use teleporters, I'm not gonna pretend I know the reason but if I remember there was a good reason as to why air wasn't allowed to use teleporters