I'd say that permacomputing's principles are first of all something to apply when designing new systems and new software, so as to prevent that from happening a

I'd say that permacomputing's principles are first of all something to apply when designing new systems and new software, so as to prevent that from happening again. I think systems such as Nix/Guix would be useful for permacomputing, with which (unlike in many Linux distros) you can keep old libraries that older un-upgraded apps depend on right beside newer versions of those libraries.