If someone will sleep, it’s a chiyuv to do so in the sukkah.
You and rso repeat this position again and again. Can you source that the Petur of Tashvu KeEin Taduru only applies when you can’t eat/drink/sleep? For example. I can sleep in a cold Sukkah, but it’s just a lot of work to move blankets outside. Or someone who’s scared that he’ll be robbed. Can you show me where it says that you have to be that scared that you won’t be able to fall asleep from fear? Or where does it say that it has to be that cold that you won’t be able to fall asleep? Or that if I’m two hours away from a Sukkah, I have to drive there and can’t eat outside because I can hypothetically eat in a Sukkah?
The R’ma is specifically talking about when/where it’s cold,
I found this sefer, where it says that the custom in Egypt was to be lenient about sleeping in a Sukkah, because the air is foul and there’s a concern that he may get cold.
I looked up the average weather in Cairo in September is 72 and in October is 67 degrees Fahrenheit. Bnei Brak’s (October) average is also 67, Tuscon (ditto) is 59, Phoenix is 66, Melbourne is 46, Cape Town is 53, Miami is the only major Jewish community which is an outlier, is on average 74. And I’m not counting Montreal, Chicago, New York, or Toronto since those are quite obviously way colder than Egypt.
If Egypt is cold enough that the general custom wasn’t to sleep in a Sukkah, can you name me where it isn’t?