I've refocused on web development in a new job after six years of being mobile dev first. To me, the answer is that design and user expectation got more complic

I've refocused on web development in a new job after six years of being mobile dev first. To me, the answer is that design and user expectation got more complicated. Look at what was considered a state of the art web page 10 years ago, and you'll find the UX wasn't nearly as nuanced as today. Combine that with polyfills and responsive design requirements and it's just as complicated as a native app, and look how big those things are.