I'm planning to do the old-wiki -> new wiki (Debian 10 latest Media Wiki
install and MariaDb) this Friday.
Sometime late night US ET time.
Let me know if this poses a problem for you.
The domain once complete will still be https://wiki.osgeo.org
But I will take it down during the migration.
I don't expect more than 2 hrs downtime. Hopefully only one hour.
Thanks,
Regina