In the end my "upgrade" to 24.04 LTS from 22.04 LTS was a disaster. A whole new fresh 24.04 install had to be done and I had all the usual hassles w.r.t. installed apps, app settings and so forth. Of course I had separate disks for the backup system snapshots and the data files. but the timing of this system failure was awkward for me - perhaps ... More @Wikipedia
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