Interesting. But my impression is that much no lead solder is actually lower lead solder, and that the RoHS requirements kind of tiptoe around this. As the amount of lead in solder goes down, the difficulty of using it, and possible long term complications go up (tin whiskers being the coolest named one). And for difficult to solder metals, the corrosiveness, and nastiness, of the fluxes go up.
Obviously lead is dangerous, but so are many other metals and industrial chemicals. It's important that as lead is removed from electronics manufacturing, its not replaced by differently toxic materials, or that the service life of components isn't diminished, not just because of the consequences of catastrophic failure, but because, absent one hundred percent recyclability, the increased number of things made to replace ones that died is an environmental problem, and possibly a health problem - more and more things, even if of lower toxicity may be equally dangerous.
