I’ve noticed lately that the salutation at check out lines is no longer: Have a nice day!
Such words of good will—that is, if we say anything at all—have morphed into a sort of vague and noncommittal phrase that could cover lots of things, or nothing:
Have a good one . . .
Have a good what? A good morning. A good day. A good year. A good beer. A good time. A good marriage. A good drive home. A good life.
I guess it is the ubersecular version of God Bless, though a very different sense of the concept of One.