I disagree. My first response to an EOL question will always be to vote-close as off-topic it for being EOL, or as a dupe to the old-releases question, unless someone conclusively proves that:
- The question is independent of release
- NO answer is specific to that release
- Upgrading to a supported release will not solve the issue
In particular, consider Eliah Kagan's comment in your first example:
... this is in the minority of new questions about a problem in an EoL release where (a) we know the answer is release-independent, and (b) both the question and the answer (because they involve a common activity with a non-obvious pitfall) seem like they may be of especially high value to others. This could be edited to generalize it to all releases ...
And your second example is non-problem. It's more curiosity than anything else. If someone asked a question about the reasons behind the migration to systemd, I wouldn't close it, since it is not a problem. (It might be too broad, though.)
If the poster really wants help, let them post on Unix & Linux, where we have no restriction on releases, and where quite a few of us are also active. We have a set of topics on-topic here, and EOL/development release problems are not in that set.