"Euphoria" has been popping up on my news feeds more frequently in the past decade or so. First jokingly, like the /r/atheism post that got a lot of mockery, "in this moment I am euphoric..." But now in a more traditional sense of the word in articles like this. It's interesting because I'd always associated it with intoxication, like it is a private experiential state that an individual has entered, so it had a slight negative connotation but obviously there are these positive situations for using the word too.
A linguistics student should write a dissertation on semantic shifts for words online (I'm sure this has already been done by someone).