@Ragman,
One of my knees is a prime candidate for replacement. I haven't done it in part because I still get around. But also my Medicare and the plan I carry make it expensive for me. The last time my wife had her knee done they gave her minimal care. Meaning they didn't give her a chance to be able to stand up and take some steps before sending her home. Not sure I want the indignity.
When her first knee was done, same place, same team, she was treated well and had therapy sessions. The difference is, the SOBs keep defunding what Medicare covers. Even Biden is working against us on it.