I had a couple other thoughts on my recovery, just as general info. The replacement can slightly lengthen your leg, apparently, and I ended up with a lot of hip pain (honestly, more than knee pain after the first week) because it's already my longer leg. I went to the chiropractor a lot for that, but it's been fine since then.
It also straightens you out, if you aren't straight already, so if you have had boot work done, you will need to get it redone. That one threw me for a major loop during my first ski season back: I could not turn right. After being under-edged my entire life, I was over-edged. Throwing my upper body around trying to make a turn, just weird stuff.
The third thing was that my proprioception was all screwed up for a year or more. It has improved quite a bit, maybe not completely, but envision that they are cutting your leg off and reattaching it. Sort of. But there are a lot of nerves and all those things that need to grow back. Your connection to the ground. I have always had very good proprioception, but suddenly I was just lost in space. Especially when moving. Chairlifts were terrifying. I have been riding them for 50 yr, right? Suddenly it was the scariest thing I had ever done. I would not ski a run where I could not see the entire route below me, either. We were at Bridger Bowl and there was this fun little chute with a big boulder in the middle, where you had to turn past it and dogleg to the remainder. I literally could not envision what to do and HIKED BACK OUT. Those of you who know me from the past know that such terrain is (was) my favorite ever. It was really disconcerting.
So -- these are a few unexpected things that you may or may not have to deal with. The pain relief was amazing, especially after the first year. I never even think about it now. But there were some other effects that did get in my head, mainly because I didn't know they could happen. Things have mostly improved, but not entirely, and I am sure some of it is just normal age-related change. And it is always in the back of my head that I don't want to eff up this leg, so I am quite a bit more cautious than I used to be.