LOL. I must really seem weird to you then since my hives are effectively wrapped with foam insulation 365 days a year. Bees love it.
I have no need to remark on how you seem to me, but in this particular instance, it is two completely different things. of course bees love insulation, it can keep a hive cool in the summer and warm in the winter. wrapping a hive may insulate it, but insulating your hive is not necessarily wrapping it. I doubt you wrap your hives and keep them wrapped 365 days/year. plus he already mentioned really the intent to 'unwrap' with the criteria of 'above' 40. my only guess is they must have wilder temp swings until later maybe.
and we all insulate our hives. using foam wrapping 365 must make it awfully difficult to do inspections, swap things out, and harvest though, if you have any decent sized operation. Cannot see myself unwrapping even 50 hives every time I need to do something with them, then wrapping them back up/etc....and it is clearly so obviously unnecessary.