Correct. Most backend engineers today do only the APIs to be consumed by the frontend. And there always was some sort of a separation in the industry: I rememb

Correct. Most backend engineers today do only the APIs to be consumed by the frontend. And there always was some sort of a separation in the industry: I remember when in some enterprisey places there was the strange role of "webdesigner" or some other (often incorrect) term that was half-designer half-programmer that only took care of HTML/CSS. Javascript was used very sparsely. There were several frameworks whose whole spiel was to allow people not to write HTML/CSS/JS. Anyone doing both the backend and the HTML/CSS part was considered a bit of a unicorn, even back then. For a lot of self-taught people doing "everything" was the norm, but in the industry it wasn't. Then came Bootstrap etc and sorta equalised everything. Then came Angular and React and we needed a name for people doing the HTML/CSS/JS work. When rendering on the server became a focus again, the responsibility of writing the markup once again fell on people able to do HTML/CSS. Which means frontend developers. Which means JS.