I had both of mine replaced in 2014 each six months apart. I can climb steps again without holding on to any railings and I now climb 34 foot ladders while I am remodeling my home.
They have not said that her knees are shot. I would completely give her a pass for that but she looks and acts like she is always heavily medicated.
That’s my plan also. We live on a sailboat and I need to be mobile if we’re gonna make it to Australia!