When "new and improved" software is so much more convoluted than the older version. In this case, I'm working with a document storage system and want to get all published documents in folder 1234.
In version 7:
docs = Content.GetById(1234).Children;
In version 8:
if (Content.HasChildren(1234))
{
docs = Content.GetPagedChildren(1234, 0, Content.CountChildren(1234), out _).Where(x => x.Published);
}