Am I right in thinking that this phrase is not quite as ubiquitous in the States as it was in the 80s and 90s? (I’m basing this on evidence from US TV and movies, not the most solid of bases, I admit). If so, has it been replaced by anything?
And when did the phrase begin to gain such popularity? I realize that variants such as ‘Have a good day’ are as old as the hills, but it’s the rise of the nice one that interests me and its sudden dominance over the tongues of all in the service industries, which I think I became aware of in the late 70s. (It gained a small foothold in the UK but thankfully never took real root here.)