Comment by OkayPhysicist

I went to Vegas a couple months ago, and one thing that absolutely blew me away was the fact that, just within the last ~5 odd years since I last visited even the casinos stopped reeking of tobacco. I figured it was a confluence of factors: people smoke less now, people are far more likely to vape than smoke (which, for its ills, definitely doesn't leave a lingering stench like cigarettes), and there was a lot of talk about improved ventilation in response to the pandemic.