I haven't put up a tree since the late '80s. Back then my wife insisted on a real one, and it did smell great and looked great -- but we had carpet, and the needles were annoying. And little Arizona the red tabby kitten thought batting at the lowest-hanging decorations was a cat's most sacred duty.
As for trees when I was a kid, yes, we used to go out to the big grocery/home store, Schwegmann's (a precursor to Walmart), and pick one up in early to mid-December. Dad and Mom would set it up in the dining area of our place, on a tiled floor with no heat sources nearby, and mount it in a stand with sugar water in the bowl to nourish it. For some reason we used big Christmas lights -- I guess they were outdoor lights? We switched them off when we went to bed. I can still see the reflections of those multi-colored lights in the curved glass of my Timex Electric watch when I was 13. Our cat Rusty, also a red tabby, his first year slid in underneath the tree and curled up around the base; oddly, he didn't give us much trouble about the decorations.
The tree would be drying out and shedding needles by the 27th. We usually kept it up until my brother and I went back to school in early January.