I always tell people, "you do you, and you've only got one life to do it", so if the pros genuinely outweigh the cons, then go for it. I will say this though, you don't look a day over 55 in that photo! I also know someone with total knee replacement (and other bits too, she's practically a cyborg at this point) and older than you, and still super active, so it also comes down to how you feel, whether you feel 67 or it's just a number. I know my 36 is just that. I feel just (and conveniently) old enough to have a pint. 😆