The 1.35.0-wmf.23 version of MediaWiki is still blocked[0].
Neither this version nor the subsequent 1.35.0-wmf.24 can proceed until this issue is resolved:
* T247562: Warning: Memcached::setMulti(): failed to set key global:segment:... - https://phabricator.wikimedia.org/T247562
Thanks to the many folks who have contributed debugging on T247562 so far. If anyone else has any insight, further input would be certainly be appreciated.
-- Your erratic train enabler