Wow, great report! And so encouraging for those of us who may need a TKR sometime in the future. I love that you said, "I rarely have to think about the new knee".
As for moving the knee sideways at night, well, I'm sure you remember the struggles to find any pain free position at all for your knees at night. So, this is much better.
Glad you did not injure your new knee due to that fall.
As for the PT costing you lots of money, what a drag but so necessary. I'll probably wait until I'm in my early 70's before pursuing TKR unless things get rapidly worse. If my PT is not covered by insurance then I'll just consider that to be one of those theoretically non-existent additional expenses that I am expecting as I grow older. From what I understand, PT is the key to regaining good knee function.
"You can never cross the ocean until you have the courage to lose sight of the shore." - - - C. Columbus