I used root in astrophysics for a couple things, but that's hardly outside it's intended audience. yt is generally considered to be easier to pick up now instead though.
yt is magnitudes better than root that putting them in the same sentence is as sensible as comparing apples to jurisprudence.
ROOT and yt have quite different domains (although it's probably possible for each to emulate the other...) so I'm not sure it makes sense to compare them.