Lawned Rights-of-Ways Revisited

One item that the SkyTrain lobby are loath to show, is lawned rights-of-ways for modern LRT and I wonder why?

Even in parched Australia, lawned tram track is being laid.

But it is in France, where lawned tram track is de rigueur, making the tram a part of the cityscape and not an eyesore. The modern tram is “green” in more ways than one.