It's been 2 1/2 years since my TKR of the left knee. In retrospect I should have done it 5 years earlier. But the surgeon went with expensive jel injunctions instead.
Say of the surgery, left the house at 9AM, it was a 1/2 hour drive each way and was home at 3:30PM.
Walked out of the surgery center with crutches. Next day a 1/4 mile walk. Then 1/2 mile the following day.
That was all before removing a couple of pounds of bandage.