The few people I know who still smoke do it for stress and weight issues. I have casually mentioned a few healthier alternatives to them but none seem receptive so maybe there are other, more personal reasons.
Most "Healthy Alternatives" completely miss the point - assuming things like eating a carrot stick is going to be at all the same as inhaling a chemical when one is stressed or hungry or that taking up knitting is going to be a perfect substitute for a mindless habit.
I was thinking more along the lines of meditation for stress, and IF for weight loss. I've seen both work well amongst non smokers, so hoped they could work for smokers too.