I "love" the outdoor exposed NM-B cables. That's awesome, in a scary way.
Though I do know from my brother's experience that romex outdoors will last a surprisingly long time. The previous owner of his previous house literally hung 12/2 between the house and the garage, off the eves of the house and the garage, and it had been that way for years, and was still intact. I think the yellow color on the jacket was caused by the sun and not original yellow