So I went and checked in Disk Utility whether or not my disk was "journaled" already. It said "Journaled: No" and the option "File - Enable Journaling" was greyed out. So I assumed my disk was formatted somehow differently. Then did a backup and erased and re-formatted my disk as "Mac OS Extended (Journaled)". Re-installed Big Sur and loaded my ... More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.