On the upside, it's edible, not deadly. (Not that Americans seem to eat it.)

At least not deadly to humans. Not sure what impact it's having on, say, other plant species in The South.

I grew up in the south and it's definitely legendary, but my sense is more that it's everywhere but more annoying than devastating. It needs a ton of sunlight which limits it some, but also means it grows along the edges of forests by roads, where it's extremely visible. Gives the impression that it's taking over everything but at least when I still lived there it wasn't. It is certainly out of control though, in the sense of like, we couldn't stop it even if we really wanted to.

I've cleared a couple patches of it a long time ago, it takes persistence but isn't as bad as some other plants in the end. Letting a goat have a go at it a few times a year will end it in a couple seasons.

That sounds about right. I just haven't actually studied the issue.

Florida pythons do not even need a strategy either.