We'd lose the ability to search the archives, which would be a shame - but we do have the option of just setting something up ourselves. Then it really would be "unofficial", which this site really isn't. We'd just need a few volunteers to do moderation and admin (preferably US, Europe and AUS/NZ so that there's always someone awake), and--to start with--a fairly trivial amount of money for hosting. There's no way it would be as slow as this. If we all (or a critical mass) agreed to go, we could do it. If only a few of us do, there's no point even bothering.