User blog comment:MisterWoodhouse/Evolving with the Web: Keeping Google Happy/@comment-168424-20210114182512/@comment-24006128-20210114182900

Faster page loads on UCP are mostly due to back-end improvements. The newer version of MediaWiki is not only more performative, but we also have a cleaner install now because we pulled all of our custom core changes out and put Fandomization of the engine into an add on layer.

The only downside from this work that comes to mind is that it's work to do. We'd like to not have to do it, ya know?