1) I don't keep them all, but I have had trepidation about removing them when I am not sure WHY perl creates a complete new directory structure for each update. If it is completely safe to remove them, then why is it not safe for the update to install into the same directory?
2) You have it backwards. The problem is keeping all addons and modules installed when updating perl. Again, if it is safe to just mv everything, then why does perl install into a completely new directory structure?
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