This post brought to you by a sleep-addled mind.
While I can only speak from personal experience, I find it incredibly difficult to sleep when it is the wrong temperature. Too hot, too cold, even by the smallest margin, and the night is spent tossing and turning (and probably some muttered invective as well). Too hot means you need to turn the AC on to whatever level is appropriate to correct the temperature. Too cold…
Too cold is a whole other story.
While you could turn the heat up that may not be the best course of action. You then have to remember to turn the heat back down. There is also a cost factor for heating which is perhaps unnecessary. Particularly if it is only slightly too cold.
One solution that comes immediately to mind is to share the bed with someone. Then the radiant heat of a second body would raise the temperature the small amount to the more desirable comfort level.
But that isn’t much of a solution, is it? It introduces all sorts of uncontrollable variables into the equation of sleep and temperature!
Most likely, the delicate level of temperature that is most comfortable to you, would not be the same as that desired by the hypothetical bad-sharer. Only the incredibly lucky find someone whose desired temperature level has sufficient overlap. Everyone else will lay there slightly chill and perhaps slide a little closer. Meanwhile the other person is pilling blankets because they’re freezing. Then you’re roasting and the night wears on and then the other person starts kicking off blankets because it really is too hot and then it gets cold and the blankets come back on and the vicious cycle continues.
The only real solution is to dome the entire planet and get rid of temperature fluctuations entirely. Then everyone only has to become accustomed to one temperature.
Okay, that might be a bit out there, left field, etc. More easily accomplished: have a selection of blankets with a range of thermal properties so temperature variance can be accommodated. And sleep alone.
You are now returned to your regularly scheduled silence.