I happen to be 64.
I remember when a trip to the amusement park would have been 'a lot of fun' or 'so much fun'.
Today it is 'so fun'.
Please enlighten me on this usage. I sure doesn't sound right to me.
Good question, Cliff.
I suspect it derives from the growing tendency to use "so" as an adverb meaning very. For example:
It's, like, so cool. So amazing.
(With lots of stress on the word "so".)
The word "so" is starting to mean more than just very to the youth. It's becoming an adverb used for emphasis.