Others have touched on the subject but one of the biggest issues is browser compatibility. Building a responsive website that works on all major browsers, acro

Others have touched on the subject but one of the biggest issues is browser compatibility. Building a responsive website that works on all major browsers, across multiple versions, as well as all the mobile quirks is not an easy task in the slightest ... and that's just to make a site look pretty. Then we have to start talking about building massive web apps that are front-end heavy which requires even more tooling to scale, maintain properly.