@jackfowler Awesome, your information helped although I think it could use a bit more explanation. I was stuck on Field Groups, but then I realized you meant a Group field.
@hube2
@tdmalone
Yes, nested tabs works!
You first need to create a Tab field, then after the Tab field add a Group field ( NOT a Field Group ). Leave the Group field Label blank and in the sub fields of that Group field add your nested tabs and fields.
