I changed to the newer kernel using `armbian-config`, and then my system wouldn’t boot off the nvme (or even display on the console). I had to boot off the SD card, and I noticed that `/boot` still had the old images on it. I ran `armbian-config` from the SD card changed the kernel from there; that updated the `/boot` volume correctly. Afterwards I could remove the SD card and go back to booting off the nvme. Now everything works great again.
Just posting this in case someone else has the same challenges.