I still want one of the purple and yellow full length duster coats that Dynastar did for their reps in the 90s.
If I were starting a clothing company it would be Spanx. And I would now be a billionaire. If you want to solve a problem, keep women warm and put them in Spanx at the same time.
Selling insulated coats to dudes is something only dudes who don't want to work could come up with.
Well, I'm a dude and I like insulated jackets for one simple reason: I ski in Europe.
Due to the amount of vertical in the Alps, you can find yourself skiing a mountain that has a 20F temperature difference from top to bottom, sometimes pushing 30 degrees on a really big mountain in the right conditions. If you have to throw on a bunch of layers to handle the temperature at the top, then the vents from your shell won't cool you down enough to handle the temperature at the bottom (too many layers between your shell and your body blocking out the cool air). In that case, you'd have to choose between being cold at the top, sweating at the bottom, or skiing only a small range of altitudes to minimize the range of temperatures.
On the other hand, if you've got an insulated jacket, then the vents bypass that insulation when they're open. And, since you don't have to wear as many layers underneath an insulated jacket, that just makes the vents even more effective when you open them up. So, instead of constantly faffing about with layers or making the tough decision about which inconvenience you want to suffer, you just zip up as you make your way up the mountain and then slowly open the vents as you make you're way back down (rinse and repeat throughout the day). Easy peasy.
I've simply stopped using shells in sub-15F temps, for the same reason (vent/insulation mismatch). Imagine having to muscle off your uninsulated shell because it's got a 2mm layer of sweat ice on the inside of it, freezing it to the midlayer. No thanks, never again.