Originally Posted by Meticode
They explained it perfectly fine to me in Genysis. He's aged because the human tissue on his exco-skeleton ages like normal living tissue.
Yep the explanation makes sense. To me the problem is an old Arnold is just unappealing. We all want to see young bad ass T2 Arnold, not over the hill Arnold.
Just like no one wants to see teenage whiney Darth Vader...we just want to see adult Rogue One Darth Vader.