Yes, Jeff, you're one of the lucky ones!
I can add a little to this:
When I had my Partial (PKR), I had been bone-on-bone for several years. My surgeon was trying to nurse me along until I was 60 - he believed in the rather outdated theory that some people are "too young" for knee replacement. I made it to 59!
During those 2 years, my mobility and my quality of life deteriorated. Consequently, I lost muscle power. My quads got very weak and I had some deformity.
My recovery was long and quite difficult. In particular, the tendons at the back and outside of my knee had shortened and some of my worst pain was felt there, rather than around the incision.
That PKR failed suddenly after 11 years, during which I had had total mobility, and had walked and traveled everywhere.
Consequently, when I had the replacement to a total (TKR), I went into it with no deformities and with good muscle strength.
Even though it was a more extensive operation, my recovery was uncomplicated and I needed very little physiotherapy. The end result is stellar.
I've learned from that. My other knee is bone-on-bone now, but it hasn't affected my mobility yet and has had only a small impact on my quality of life so far. My new OS told me last year that he would do this replacement when I felt the time was right. The knee did bother me in February, when I was visiting my son in India - the pavements there are rough and any steps are of uneven heights. I became instantly less mobile. Back home, the knee has settled down a bit, but I've seen the writing on the wall. I'm not going to wait until I get less mobile and develop deformities (and put on weight).
I'll be travelling again from June to August, so I have arranged to have the second knee replaced in September.