>>2442343you don't wear your thermals anywhere they can get wet. if your hiking clothes are wet, you hike wet, your threshold for hypothermia is much higher when active than stationary. once you're done hiking you set up shelter and change into dry clothes.
the hypothetical scenarios you would be fucked with this system you would also be fucked with extra clothes. the ones i can think of are a shelter failure that isn't repairable or takes too long to repair. or a river crossing where your bag got fully submerged and soaked into your liner. there are a few scenarios where the extra change of clothes could help, such as wearing the wrong kind of rain gear in extended downpour torrential weather where its also cold, but experienced backpackers know how to avoid all of these. i do bring extra SOCKS, 1 more pair than the typical person would on every trip, which i think covers 90%+ of the times you need extra clothes, because its usually only socks you actually need.
the worst case is usually you bail on your trip early. only time i had to actually use a locator beacon was an injury.
its generally known in very wet climates to only wear quick drying synthetic clothing and to avoid relying on things like untreated down, even treated down, wool, etc as your insulation except for some specific use cases such as socks or sleeping thermals. its also well known to avoid relying on dwr based rain gear that can wet out on longer trips. i see a lot of frog toggs and packas with the section hikers here.
likewise in very humid climates without a lot of rain something like wool becomes better, because it retains more warmth when wet (note: this doesn't work if the wool is saturated, only if its damp)
anyways i stopped feeling the need for extra insulation or hiking clothes about 3 years into backpacking in the pnw (very wet) but i would recommend bringing them when you're newer to things and more accident prone. bring extra shit on your first thru/section hike for sure.
