There's a place where I think the interplay between MetaBox and WordPress behaves counter-intuitively.
When unchecking all features under 'Supports', like this:
I expect no built-in fields to appear on the form.
However, WordPress interprets this as "default to showing a title and editor field".
But MetaBox knows that this wasn't the users intent. So, instead of issuing an output of
'supports' => ,
wouldn't it make more sense for MetaBox to output
'supports' => false,
which will indeed cause the expected result: don't display native fields?