They won't look so good when all of the parts head south at different speeds.
;-)
Honestly,
I've seen some in nursing homes that still look pretty good.
The art has changed, the inks, dyes etc...as well as we as humans. I know some 70 year olds that still have pretty good muscle and skin tone.
I don't understand this "Think about how awful it will look in the nursing home!" mentality. Odds are, between wrinkled, pasty skin, varicose veins, thinning hair, ever expanding nose and ears, hair in wierd places, incontinence, an inability to chew hard food, bed sores, and dementia, my tattoo will be the least of my worries.
It might be the only thing that gives me joy, if my kids decide not to visit me because I smell funny.