I think Gabriel was referring to a historical moment -- Wikimedia does use Varnish now. "We currently use Varnish for serving bits.wikimedia.org, upload.wikime

I think Gabriel was referring to a historical moment -- Wikimedia does use Varnish now. "We currently use Varnish for serving bits.wikimedia.org, upload.wikimedia.org, text of pages retrieved from WMF projects, and various miscellaneous web services. Nothing uses Squid." -- https://wikitech.wikimedia.org/wiki/Varnish https://wikitech.wikimedia.org/wiki/Varnish