John, that is an excellent discussion. Just a couple of comments.

Red dot tube scopes: I use those on two handguns. On is a 454 Casull and the other is a 30 Merrill. I changed out tube scopes for pistol scopes which I found somewhat difficult to use in the woods.

Red dot size: I use 2 mil which I find easy to use. My hunting buddy only uses 1 mm as he says that larger dots cover up too much of the animal for accurate shooting.

Scopes look fine on double rifles however I would never mar a vintage double rifle by adding a scope.

Red dots look OK on modern rifles but looks like a big wart on a vintage rifle.

My thoughts are that if one cannot see iron sights and will not get shooting glasses to allow one to see the iron sights + target, they just need to get a modern rifle and not bugger up a nice vintage rifle.