I’m not talking about a complete rebrand, but let’s say your a/b testing discovers that users react better when there’s 20% more whitespace between elements. If you’ve got all your margins contained in your CSS (or better yet a global SASS variable to control default gutter sizes) then it‘s trivial to update and push. If you have to search through every view in your project to see where you might have snuck in some inline styles… well, you’re just not going to bother. Which means you’re throwing user need / conversion away.
