[kwlug-disc] Disk longevity ...

[Khalid Baheyeldin]

Bob,

That approach will work great for many applications.
However it can be problematic for others.

An example is when an application does an upgrade from an old
version to the new version that changes the data structure that is
stored. For example, MySQL does that frequently between one
version to the next. Firefox is another case, where ~ version 93
and over are not compatible with the data that is on version 91
which is the ESR.

So it would be a one way street (from lower version to a higher
version) for some applications, and you cannot go back once
the newer version has started and messed with the data structure.
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