Roundup (glyphosate) works. Really well. And it doesn't remain active in the soil, so if you use it correctly (to kill off an invasive weed) it is far less harmful than many competing herbicides. The ordinary homeowner who uses glyphosate probably bears almost zero risk, again, if used properly. Commercial farms may be a different story because they are using huge amounts on an annual basis. But again: tradeoffs. Glyphosate allows farmers to use conservation tillage and to greatly reduced soil erosion, which over the long term threatens American farmers more than any Argentina ever will.
So Bayer changed the formulation of consumer (not farmer) Roundup to a different chemical. I noticed that after I bought it this year and it didn't work very well. Thankfully I noticed before I used it around my vegetable garden; the replacement chemical DOES remain active in the soil for weeks. And it works less well so people will likely use more of it. I don't think that's progress.
Me? I use 30% vinegar whenever I can. Cheap and Immediate weed killer and makes my yard smell like cheap vinaigrette dressing, which I kind of like. Roundup for the invasive stuff caused by my idiot neighbor not killing her goat head thorn weed, which punctures my bike tires. In other words, be a smart consumer, but don't ban something that causes people to switch to something worse.
(by the way, Agent Orange was not glyphosate)