It's so odd how experiences vary on this. I'm in my 40s (in the US) and still have all four of my wisdom teeth. When I was a young adult, my dentist told me that they were all intact, and (over time) not moving, so there was no reason to do anything with them. I've gone through a few other dentists in other places since then, and no dentist (including a recent one I had that annoyed me by recommending harmless but unnecessary procedures so they could pad their bill for my insurance) has ever pushed me to get my wisdom teeth removed. When I've started as a new patient at a new practice, they've noted I still have them, and after I say "yup, they've been stable since I was a kid, and cause me no pain", they immediately move on and don't bring it up again.