As the main sysadmin for the archive team's web frontend (this one happens to be hosted outside of my control) Yes, its mediawiki, no we cannot use fancy cache, JScott has a special deal with the web hoster that makes the hosting damn near bullet proof. on top of that, the overall group is anti-cloudflare. so we are kinda stuck with what Ive been able to meek out of a cpanel shared hosting plan.