We have a 22 yr old siamese. She’ll be 23 in Dec. She can still make it to her food bowl and uses the litter box. Her vision is fading and her back legs have a bit of arthritis. Don’t expect her to make it much longer but I said that when she turned 20. /;o) ~
Siamese are one of the longest living cats.
My Siamese made it to 18 but developed an untreatable problem and I had to have it put down.
My wife and I would get another pet, but at our age they will outlive us and we don't really have a relative that could take them in.
So I have wild squirrels and birds that I feed daily, and they go home at night. - Tom