[somerandomone]

I would argue it is broken. >It can handle a limited amount of traffic, and controllers can't see anything outside of their own airspace—when they hand off a plane to a contiguous airspace, it vanishes from their radar.

To me there's no way to tell if the plane flies out of their space or drops out of the sky at that moment. If that's the case the search and rescue won't be better had MH370 happened in the US.

[Someone1234]

Even with this new system MH370 could happen to an aircraft leaving the US. Both the pacific and atlantic oceans have giant radar black spots where aircraft aren't trackable and instead they rely on HF to guestimate where aircraft are [0].

[0] http://www.technologyreview.com/news/533871/could-passenger-...

[foldr]

>To me there's no way to tell if the plane flies out of their space or drops out of the sky at that moment.

The problem there is primary radar coverage, not the ATC system. (MH370 turned off its transponder so the only way to detect it was via primary radar.) There's no point in spending huge amounts of money expanding primary radar coverage just to get a marginal benefit in an enormously unlikely scenario.