With SharePoint 2013, Upgrade Evaluation Site Collections can come in quite handy. They allow you to test what a site will look like once upgraded without affecting the site you just attached. If there are issues, you can just correct them...
I’ve suffered through my share of SharePoint upgrade / migration projects now and I have really changed the way I look at them. Often when you get exposed to a new system, the lack of governance has led to a total mess with site sprawl as far as...