With the actual layout models, I see it more of an evolution thing. For someone starting on CSS today, you do not have to learn all 8 now if you don't want to,

With the actual layout models, I see it more of an evolution thing. For someone starting on CSS today, you do not have to learn all 8 now if you don't want to, just master the grid. It was designed to be the last one to rule them all.