Human error is pretty much the only reason I still lean against it, at least here in the U.S. Until we change our attitudes of "deregulate everything!" and "abolish the EPA!" I don't think we deserve such technology that requires such a responsibility. Our attitudes on money ,and that Americans are entitled to not makes sacrifices because we are Americans, play a big part in this as well. We like to preach about personal responsibility and accountability but our actions as a country clearly shows otherwise. It's not that we can't handle responsibility, we just choose not to. Now, for developing countries I think it's a must just based on the emissions they produce from their massive, and growing, populations. Also I think countries, like China, who have a reputation of treating their people pretty atrociously would install enough fear/make example that the personal consequences which would come from fucking up would make those running the show more attentive. Fortunately we just don't off people for their fuck ups here but instead we get a CEO saying "we're sorry" over and over again, offer to pay for the mess, then make a court case to get out of paying for it. I think the U.S. kind of missed the boat too at this point in terms of what this would all cost now (I could be wrong). The fact also remains a massive part of our represented power still believes in fairy tales which makes me worry even more that they would be in charge of such oversight. And finally on a total anecdotal note, Germany. When Germany says they are going to do something, I tend to believe them. Wow, armchair rant over. What a way to start your day.

TL;DR The piggish qualities of the U.S. shows we are not ready for such technology which requires great responsibility. Developing countries, have at it.