> a bunch divs positioned arbitrarily via css is much less intuitive than <tables> where you can move blocks of markup to redesign geometrically <...> Using tab

> a bunch divs positioned arbitrarily via css is much less intuitive than <tables> where you can move blocks of markup to redesign geometrically <...> Using tables is still much more pleasant, but modern browsers dislike table layouts and render them horribly. With html being a semantic markup language, tables should appropriately be used for tabular data. Grids are addressing a layout concern, in which you want to position stuff on your page just so. With grids, you can easily change the arrangement of your elements within a grid at different screen sizes, or opt out of the grid altogether. With html table markup, that would not be not possible.