[quadrupleslap]

To change it, I'll have to go spelunking through either the HTML or the CSS, and if I was a designer, I'd probably pick the CSS. Looking for the 'product' class and tweaking a few properties sounds much nicer than figuring out how I need to change 'col-xs-4'. I'd rather have a conversation with the layout engine than struggle with some middle-man generic CSS framework like Bootstrap - it's simpler and more flexible (imo).

[nilliams]

The lower-level abstraction (raw CSS) vs the higher level (bootstrap's grid) is more flexible. It's not simpler though, which is why the abstraction is worth learning. With a grid framework, you can make changes at a common level of abstraction that your teammates will understand. Because I guarantee the way you'd implement the equivalent behaviour in raw CSS is not how I would, and now we have both styles in the codebase (complexity).

Also yet to meet one of these 'designers' that would rather change CSS than HTML. And logically ... you can't understand CSS without understanding HTML, so preferring to make the change in CSS is just an arbitrary decision.