Having @heyjoe415 say the following was just what I needed to hear to help with my ambivalence: "... if your surgeon says the joint will eventually have to be replaced, go ahead and get it replaced as soon as possible and at a time as convenient to you as possible." My surgeon (at HSS in NYC) has left the decision up to me. He said it will eventually need replacing. He replaced my left hip in 2017 and his PA said i "waited too long" to replace that one. My husband's Lewy bodies dementia has gotten dramatically worse in the past 2 weeks, which is terrifying, so I feel a bit more confident I'm making the right decision to have THR in April. I agree it is best not to wait until pain interferes with functioning and sleep and fitness cannot be maintained. It's just rare to hear of people having THR based on logic and realism about one's future vs. being burdened by pain. Thank you for your help. All the best to you as well.