I'm 30, and I've seen them twice in my life in-person. However, I believe that they were in very old buildings. Can't remember exactly where, though, since they were both over ten years ago.
I did see them around as a child millenial. Not totally uncommon in older and public buildings until early 2000's. The airblade dryers seemed to come in right as the last of these were phased out.
I'm Dutch and I'be seem plenty of these over the years. I can't remember where tho, probably university and maybe highschool. I feel like they're (or were) quite common