I dunno, I'm an ex smoker. If I'm near a cigarette, that crap messes with me.
But vapers? I've had to tell a few off for not watching where they blow, but it is absolutely not the same as smoke. It doesn't trigger the same responses, it doesn't speed up my heart, clog my sinuses, our send me into a sneezing bout. I'd defer to any coherent data on its effects, but in terms of being intrusive, it just isn't the same.
29?
I've seen bigger age gaps work out long term, but dang, not when the younger was still a kid in most ways. It comes down to there needing to be a certain degree of development of self before you can make a relationship be a meeting of equals where both people can move forward together rather than it being one leading the other (intentionally or not).
There's really nothing you can do about it, though. Like you said, he's a grown ass man and has to reap the crop he sows. If she's legal there, and the parents aren't objecting, there's nothing that you can the that's useful. You just hang back and see how it goes.
Treat it like you would if you didn't like his choice in dating because she was stupid, or ugly. If he asks, don't lie about your opinion, but don't bother them with it either. Trying to force them apart is likely to backfire and at the very least could make them stick together longer than they otherwise would if it isn't going to work out on its own.
People are allowed to make bad choices as adults. When it comes to family, there's a limit to what kind and degree of interference is acceptable, no matter what the family member is doing.
You've had the unfortunate discovery that your son is likely an idiot about at least this matter. Could be worse.
I agree with you, mostly.
And I've seen the opinion expressed a lot. Which means I can't really call it unpopular, though it also isn't a majority opinion either.
Where I would disagree is that his performance wasn't his best overall, despite it being his best movie. A good bit of the work involved came from direction, editing, and the rest of the cast as well. He didn't, however, do great delivering his lines.
Where I agree is that he didn't have a lot of lines. Most of what made the character shine was physical and facial. That's where he was great. He still is superb at that; he plays for the back rows, and it works.
For sure though, it's still his best movie overall