The last thing that I'd want to do is generate false hope. I have to emphasize the role that luck has played in all of this. My nephrologist doesn't know the reason why the disease is in reversal, and that's why she's so negative, because it goes against her training and experience. And even the authors of the study admit that they don't understand why a small subset of patients showed improvement. It's possible I was misdiagnosed with CKD. I may have had an acute injury that took a few years to resolve itself. I know that's the opposite of acute, but some diseases, such as sepsis, are both chronic and acute. And then it's always possible that the kidneys, as the doctor insists, will ultimately crash on me. I've read several stories on this site that had the same trajectory.
FWIW, those GFR blood tests are notoriously inaccurate. Firstly, you can raise your GFR just by cutting back on your protein intake. Secondly, just drinking more water will 'raise' your GFR as well. I know; I 'gamed the system' for more than a year to avoid dialysis this way...
Thanks for the response, Katrina. I did ask my nephrologist, who recommended amlodipine.