I stared at this spam for nearly three hours before I found this post. Little did I realize it was blocking the question to replace modified config files. I guess that's why N is the default. I had to pay close attention to not miss the next questions. When the upgrade was finished it was still spamming the screen but was able to run pve8to9 to check for issues. It told me I had an issue with systemd-boot and had to apt remove systemd-boot. Well, not sure I had to but was glad I did it before I rebooted.
"ebtables-restore" in case anyone else searches for this.
Thankfully my system booted right up and both my passthrough VMs work!