I had a flawless upgrade. I had to install the md plugin but the installer told me that. Zero issues so far. I was a little worred about having pihole running under docker, but the installer did everything it needed I guess without shutting that down. After reboot everything just worked.
Nice work to votdev and whomever else contributed!
Yes, a flawless upgrade 6 -> 7. Thanks to developers for this beautiful nas software 