Updated kexts and Clover using kext updater. Downloaded Mac OS update using Software Update like a real Mac. 2 reboots and done. All of my updates have been going this smooth since I've built this rig and setup a proper SSDT.
Big maintenance day. Did an ACPI patch and updated to the latest (F13) BIOS for my board. Updated Clover to 5100 and also updated LILU/WEG/AppleALC. Then did the macOS update. Three reboots, two of those from the installer. I was expecting about 15 minutes, but this took between 25 and 30. Sloooow. Everything seems to work.