I think the argument about when to stop procedures is a bit pointless really.
I suppose some people will carry on forever- Helen Mirren is 70 ( soon) and has reportedly just had her 2nd facelift. let's not forget Dr Mary Archer- no intellectual lightweight- who also had her face lifted. 'Work' is not the preserve of the air-head.
Equally, there will be people who do decide to give in gracefully and stop procedures, just like there are women who give up on fashion, make up and staying slim & fit when they reach 50, 60, 70, etc.
It's a matter of degree. If you rate your sagging on a scale of 1-10, ( 1 being no wrinkles) then most treatments I have heard will take you back to a 5 or 6. Done well, it's a tweak. If that makes someone feel good about themselves, makes them feel happier, more confident, improves their quality of life and even longevity- which is shown to be linked to being happy, having a social life etc- then why not?
What the discussion seems to come back to all the time is that women ought not to try to keep time standing still with regard to their faces- but it's an argument I can't understand , because most women use make up and have their hair dyed- and it's no different.
I think it's absolutely fine for some women to say it's not for them and they want to embrace old age, warts,wrinkles and jowls, but I don't understand why they are judgemental about women who feel differently.