I reckon cold hands are almost worse than cold feet. When my hands get cold they hurt and as they warm back up they really hurt. If the air and water temperature isn’t too bad then I’ll go through the pain barrier as once my hands are warm they’ll stay warm. However if it is super cold then its hard to push through the pain barrier as it takes so much longer. Cold hands will limit your ability to hold stuff. If you aren’t able to hold your paddle then you are pretty stuffed.