XS keeps columns in a phone view, but often you want to just stack the cols and not use a grid so much as just "a shelf" 90% of my designs use col-sm-*, and th

XS keeps columns in a phone view, but often you want to just stack the cols and not use a grid so much as just "a shelf" 90% of my designs use col-sm-*, and then if stuff needs fiddling at md or lg I do it there. For xs I just usually let it default to stacked 100% cols.