My winter bikes have always had traditional "inboard" cartridge bottom brackets and I have had zero trouble. As I consider some upgrades I am looking at external bottom brackets. My simple analysis considers that external bearing might be more exposed and more susceptible to winter conditions so I want to see what you folks think.
My main winter bike pretty much gets snow packed early in winter and gets very little maintenance related attention until things melt in spring. Since this has worked so far should I stick with internal bottom brackets or is external no big difference?