As you have seen there is a MAJOR update for ROME. And while I realize I’ve been mostly (ok almost totally) AWOL on the testing, helping here in the forum, etc.
To (hopefully) save yourself some headaches if there is a problem Please Please Please BACKUP first.
Backup your data and backup your system. If you’re using btrfs make snapshots (your data is in a subvolume, right?).
Using a (FOSS) tool like Foxclone to make a disk image is the easiest and best way to do that - especially for an update of this size.
As always, the (paid) tool that (I’ve found) works best for this is from Terabyte
Hopefully I’ll be back this soon (been a challenging summer…)