Back in the days of mostly static HTML, and maybe some simple JS for effects, you didn't need much complexity in the Frontend. Most logic was in the backend. Th

Back in the days of mostly static HTML, and maybe some simple JS for effects, you didn't need much complexity in the Frontend. Most logic was in the backend. That logic has moved to the Frontend, and so has the complexity. Yes, Frontends are more complex than ever before. But at the same time, backends have never been simpler. Most backend devs just implement some simple CRUD APIs for the Frontend code. The UIs also have become more complex. In early web apps, you submitted a form and got feedback only after submission. The expectations for modern web apps are much higher. Everything has to be evaluated as soon as possible, possibly while the user is entering it. Responses should show up immediately, so there is a lot of caching in the frontend. It all adds up.