As far as I know, the lower levels of smoking have not made the US health outcomes any better than places where smoking is at ridiculously high levels, like France.
It was a long time ago though.
also, opioid epidemic is not helping things. this is really reaching and not sourced but i wonder if less smoking means more people reach for pills?
numbers are higher now. but nobody was counting e-cig before. some were even getting money to buy them as they were spined as a quiting smoke path.