The problem is that devs stopped doing semantic elements. Its now a div and span fest. The layout however has become more simple due to mobile/smartphones. But the front end complexity has become exponentially more complex. You save one day of work by using a bunch of frameworks, then you have to pay every time a user visits - with less conversions due to a slow site. And then you have to pay every time you make an update - due to the extra complexity. Then you regularly have to pay over and over again to keep the frameworks up to date.