User blog comment:MisterWoodhouse/Pausing UCP migrations to resolve some critical blockers/@comment-44982440-20200907181537/@comment-24036697-20200909180116

Lukas, the many benefits of upgrading the core software that the Fandom platform runs on have already been discussed at length. I suggest you dig through the staff blog here to find the other posts about UCP.

One of the biggest reasons for the switch is security, though. Old software tends to be riddled with vulnerabilities and bugs.

And upgrading MediaWiki makes future platform updates a lot simpler and less painful.