@lawman - I'm quoting you :
"So you can honesty say, I’m as good as I was before you had none on bone? That’s a plain lie. Here’s a tidbit…. Number one most profitable surgery is TKR! In the tune of 55 billion a year! Always follow the money. "
********
Then how would you explain the vast number of people who continue on to get a 2nd knee replaced a few years after their first one? Who would be dumb enough to do a second knee if they were not satisfied with the first? In my family alone, I, my sister and her husband all have had both knees replaced, ranging from a time gap of a year to about 5 years between individual surgeries. All three of us had successful outcomes, are free from grinding pain, and are way better off after the surgeries than we were before. Can you get back the knees of your youth? Of course not, metal can't feel as good as original healthy bone, but with some limitations for extreme impact sports, and extra cushioning for kneeling activities there is very little you can't do after healing from a TKR providing you are serious in working with a registered physical therapist and keeping up with assigned exercises to regain full range of motion.

Unfortunately, whether through surgical error or a person's muscular individual oddities, or random bad luck, not all surgeries will be 100% successful. It's understandable to have a sour outlook on TKR's if you are one of those still in pain. But maybe following the money means that there are a lot of people who are paying to have another surgery on a second or third site on their body because they have had good results before.