When I grew up in the 1950s California, most residential homes still did not have modern A/C and instead used fans. By the 1960's most new homes had modern A/C. When I lived in Asia ceiling fans were still common. Here in the cool dry SF Bay Area climate, my older 2-story unit with poor wall insulation within a 4 plex condominium has A/C, however I turned it off a decade ago and it has since become unrepairable due to its unavailable refrigerant. Only a few days each summer, does my unit become too warm inside that for this person is above 80F. Instead I do what everyone did decades ago. Open windows in the wee hours and close them by mid morning.
During winters, 2 decades ago, I also turned off my gas heating. On worst winter days, am able to keep room temperatures at 60F or above by just closing upstairs doors and using electric space heaters, an ordinary hair drier, plus a fan I sometimes use to help circulation without thermal layering. As someone that backpacks and camps outdoors, I am used to sleeping in a wide range of temperature conditions including well below freezing.
