I'm just thinking about the passcode to unlock the iPhone. You have to retype the passcode regularly. Winter is coming - so wearing touch-gloves are fine for using the iPhone. To unlock the iPhone, Touch ID doesn't work with gloves, so you have to type the passcode again. Some other situations e.g. you got sweaty fingers, Touch ID doesn't work, passcode again.
I guess the passcode is part of the encryption. So I believe you should use a strong passcode instead of 4 easy digits. Besides the fact that passcode can always be used to unlock the phone, it's obvious you should use a strong passcode.
I couldn't find a lot of information about the passcode on the Internet. So I'd like to ask here. Does anyone know more about it? Are my guesses correct, or does it simply make no change to use a less strong passcode?
Update: My passcode is probably pretty strong. So typing the passcode is hardscrable for me.