Ductless Air Conditioning is the 'new new' thing!
As a little girl, I can remember fondly sleeping at my grandparent's apartment on a hot summer night in the late 1950s, with the venetian blinds open so that we got a little breeze.
No air conditioning for us back in those days...and no one else either. Boy, did it get hot!
You just couldn't cool off during the day or evening hours, and so upon the return home, I yearned for my parents to attach the oscillating sprinkler to a hose so I could run through the cold water.