This is a use case worth covering for any CMS, in my opinion. Currently when one doesn't want to maintain a CMS any longer I'm forced to tell them to crawl with wget-warc/wpull (possibly via ArchiveTeam), submit to Internet Archive and then somehow redirect users. Few CMS seem to care about it though.
In practice the only "official" solutions we have are: * https://www.mediawiki.org/wiki/Extension:DumpHTML + any webserver * http://www.kiwix.org/ + kiwix-serve (mwoffliner via Parsoid)
From https://phabricator.wikimedia.org/T17017 and https://phabricator.wikimedia.org/T93396#1136904 , it seems WMF has no interest in providing a static HTML format which is directly usable.
Nemo