I'm wondering if this, or some form of this greeting has always existed or not - and also if it is generational.
I'm a millennial and everyone in my age group tends to greet each other like this when meeting. Every single morning my colleagues ask this question too, one after the other. During times when I have been depressed I've found it particularly difficult to answer with the expected 'fine'. But even during a normal period, I find it annoying.
My grandparents never greeted anyone this way right off the bat. My parents never used to either, but now I notice they use this exact sentence as their first greeting to me in the last few years.
Am I wrong in thinking this is more recent, or has it always been a popular greeting? I find it invasive and irritating - although pretend to be easy going about it and answer with 'fine' !