"Light Rail" is just an American rebranding of the term "trolley", "tram" or "streetcar" quite frankly. I ride the most heavily used "Light Rail" system here every day. It runs in the street, at-grade, below-grade, elevated and underground. It is just a small part of a once vast "streetcar" network that existed a hundred years ago. In the 70s they decided to rebrand it as "Light Rail" in order to promote the Standard Light Rail Vehicle made by Boeing-Vertol (which turned into a disaster).
But we're getting away from the original subject is that: In the beta Metro tracks could cross at-grade. If that is being removed, then that still leaves cow paths and dirt alleyways. Those should be cross-able in some fashion, because otherwise you are forced to use elevated or underground to reach all the way out to the scattered suburbs. Most of the maps have enough empty space to make it worthwhile to use ground tracks, if not for the cow paths.
But we're getting away from the original subject is that: In the beta Metro tracks could cross at-grade. If that is being removed, then that still leaves cow paths and dirt alleyways. Those should be cross-able in some fashion, because otherwise you are forced to use elevated or underground to reach all the way out to the scattered suburbs. Most of the maps have enough empty space to make it worthwhile to use ground tracks, if not for the cow paths.