User blog comment:Brandon Rhea/How we're testing the fandom.com domain migration/@comment-256004-20181005190013/@comment-20644-20181005195845

Ultimately it depends on the specifics. I would think about it in terms of like, you're going to the doctor because you feel sick. A doctor doesn't know what's causing it until they look at your symptoms. From there, they can decide how to treat it.

It's a very similar premise here. The actions we would take would depend on what the issue is, which is why we're testing to see what issues might arise. We're also doing a gradual migration of these 3,200 and starting with lower-traffic communities first. That way if there are issues, they're less impactful.