I had dug through a lot of resources when learning CSS grid frameworks on my own (via Lynda.com tutorials, youtube, MDN mozilla developer network, things from jen simmonds, rachaelandrew, etc) when it comes to setting up a proper framework from the groundup without using bootstrap
I found this video to be the best summary of why you would want to use a CSS grid framework from an authoritative source that came out last week from Morten Rand Harrison at a talk he did
Yes, I played with CSS Grid last month and it’s pretty cool.
This is the docs page on MDN
My bet is this will replace Bootstrap in the coming months/years?.. whoever can make a CSS framework that will simplify and make this beginner friendly will win.