[SamBam]

Yeah, there's been a pretty big generational shift, I think mostly from GenZ. I'd posit that texting/social media may be a reason.

I first went to grad school ~20 years ago, and no one cursed in class, especially not the professors.

I recently went back to school and got another masters, and nearly all the mid-20-year-olds drop f-bombs in regular classroom talk to the professor constantly, like they don't even hear that they're doing it. Some professors don't mind, and even respond in kind (though much more self-consciously), some are clearly displeased, but the students barely notice.

[SoftTalker]

Yes it's particularly prevalent in the under-30 crowd, and especially people under 25. I don't know about teens, not around them very much these days.

Don't get me wrong, I used that word plenty when I was that age, but only among peers in informal settings. Never at work or when talking to a person in a respected position.