Comment by mmcnl

This is partly true, but I would also like to state things have much improved. I can vividly recall the 2000s where practically every website would look and behave differently in different browsers. I recall a lot of debugging client-state using poorly scripted PHP websites. Tooling so much more advanced and things "breaking" have moved from the user to the developer. In the jQuery days (or even before that) it was very hard to find out if everything was working as it should. Early feedback is a good thing. Understanding a framework is part of understand what you are shipping to the customer or user. Sure, it might seem more complex, but at least complexity isn't pushed down to the browsers and users.