Especially food should keep well in winter
Basically yes.. the problem is the sub-zero temperatures.. we have those in the attic too. It is a maximum of 1-2 degrees warmer there than outside.
I often hear that the laundry "smells musty" when it dries too slowly
Oh no... not at all... I don't use fabric softener or fragrances.. and still the laundry smells fresh. On our roof the air passes through the gaps and so it dries "like outside". However, it hangs there for several days..
More often we have laundry that smells like old Puma after wearing.. Here I have to do two!! pre-washes, otherwise I can't get the smell out.. I therefore think it’s due to the washing process if the laundry still smells musty after drying.