Growing up, we pretty much line-dried everything outside whenever possible. (Military family, some places we lived didn't have outside clotheslines and we weren't allowed to put one up.)
As an adult, living mostly in apartments, it's been mixed. In my current place, there is no place outside to dry clothing. Some things can be dried inside, but during the humid summers we have here, stuff takes days to dry indoors and can start to smell before it is dry. So pretty much everything goes in the drier.
In the winter, with the heat on, things dry much faster. But there isn't room to hang up a sheet to dry, so I probably dry half my laundry in the machine and half on drying racks in the house in the winter. And I have to admit, dragging a full laundry basket of wet, heavy clothes up two flights of stairs gets tiring. Stuff would freeze outside before it would dry, most of the winter. (Right now, it is 4 degrees F (-15 C).
I have had apartments with outdoor drying areas and did take full advantage of them. My last place was a Boston three decker--a three family house in a neighborhood full of 2 and 3 family homes. The area was built up during the 1920s, and pretty much all the houses had at one time had clotheslines. Mostly pulley clotheslines that extended from the back porch to a tall pole in the back yard, so that the people living on the second and third floors wouldn't have to carry their laundry up and down stairs--they could just go out to the back porch and hang it up. My next door neighbors still had the pulley clotheslines, and you could see markings on the pole where my apartment must have had one as well, but it was long gone.