I think he is around 9-11 yrs young.

I say this, because I can see it in his countenance, if you know what I
mean. His overall demeanor. He is super chill and he is quite set in
many ways. I caught him the other night, just chilling, in my BR
doorway, he was soo distinct looking, you can see the age around his
face.

My cats don't go out (except one on his walking jacket

I can understand some cats need to be restrained, or they'll just mill
off into the neighborhoods.

Ruprecht is a porch monger! He guards it. He's outside right now, I
know exactly where he is. (Either the front or the side porch). I check
the porches, like a cake in the oven, always asking him if he wants to
come in. He just sits there. He's so chill.

I bet your cat looks cool in his jacket. He probably likes it, makes
him feel tuff!