I saw that whole body lift lady too, she was brave to go through with it but she didnt really have a choice in her case I don't think.
I've considered an armlift, but ... well, I am hoping they will just improve over time, that the last weight to come off will be from my arms (I live in hope!)
I wouldnt consider a tummy tuck as I havnt had kids and I dont plan on showing my belly off in public, I found 1950's style bikini bottoms and they hide a multitude of sins!
The first set of pictures you showed, I would think, personally, that she hadn't lost all her weight. it looked quite chunky and full her stomache I thought. I would imagine it would have gone down some naturally with more weight loss. But I know with stretch marks, the skin just loses it's ability to bounce back, i would still have given it more time in her case.