No indoor smoking makes a major difference, but there still are enough semi-stationary semi-close-up situations where smokers can be still rather annoying, e.g.

No indoor smoking makes a major difference, but there still are enough semi-stationary semi-close-up situations where smokers can be still rather annoying, e.g. outdoor seating in cafes and restaurants, popular lunch break spots in parks and plazas, public transport stops, next-door neighbours… And even if you manage to position yourself upwind of all pre-existing smokers, there's no guarantee that a few minutes later somebody upwind of you suddenly won't light up…