I haven't checked this paper, but what I've read independently, perhaps based on it, is that's true. In general just knowing it's an enveloped virus tells you

I haven't checked this paper, but what I've read independently, perhaps based on it, is that's true. In general just knowing it's an enveloped virus tells you a lot about its ability to survive in the environment. See https://en.wikipedia.org/wiki/Viral_envelope https://en.wikipedia.org/wiki/Viral_envelope which points out that the lipid bilayer stolen from the host cell "is relatively sensitive to desiccation, heat, and detergents, therefore these viruses are easier to sterilize than non-enveloped viruses, have limited survival outside host environments, and typically must transfer directly from host to host." And this isn't something that's going to change with mutations. This is why we aren't freaking out more by the no protection pressure washing of the index patient's vomit outside his apartment. It was sufficiently delayed that the heat and UV from the sun almost certainly killed all the Ebola viri in it. Of course that delay wasn't so good....