Some good and bad news about my uncle.
The good news is that he's now fully out of ICU, and has been able to completely step down to a rehabilitation hospital. (and apparently, a much nicer room that has much less clinical/sterile vibes)
The less good news is that he needs a heart procedure (which we knew), and we were waiting for his kidney function to improve further because it was too risky to perform the heart procedure with the kidneys in the shape they were in (even with dialysis to help filter out the drugs used during the operation). After further kidney tests and second and third opinions from nephrologists, the verdict is that his kidneys will not regain that necessary level of function. Both are essentially useless - the tissues are just no longer viable. So, he needs to be placed on a donor list for new kidneys, and the heart procedure will have to wait.
We're trying to look on the good side though - the heart procedure isn't extremely time critical, so at least it's not a race against the clock for that. He definitely needs it sooner if possible, but there is some breathing room. And he's not in any pain or discomfort in the meantime. So that's a definite plus. And the staff say he's now a menace in his wheelchair, pushing himself here, there, and everywhere. I was joking I should gift him a bicycle horn so people will know to get out of the way.
We're all taking it one day/week at a time. Best anyone can do.