Family Unit: Past, present and future

A commenter on another website said that the nuclear family is outdated. Is this a popular thought I wonder. The family unit has undoubtedly changed in some cases, but is this a change for the better or worse? I see grandmothers raising grandchildren, single -parent homes as well as other forms of families that are now more common than before. Has society grown past the "traditional nuclear family"?


What are your views on this?