The web is exactly a bad argument, it composes terribly. You can make n*m divs for the days for a calendar widget, it won’t be recognized as a date selector. While swing, or even earlier GUI iterations realized that inheritance is a very sane model for GUI frameworks.
You know you can inherit the HTML date picker right?
... right ?
I actually don't know what you mean. Can you please tell me?
Webcomponents allow inheriting html built in elements.
https://developer.mozilla.org/en-US/docs/Web/Web_Components/...
> Customized built-in elements inherit from basic HTML elements.
The HTML is an excellent exemple at that.
You are never "limited" by highly abstracted librairies since at any moment, you can write your fully customized one.
And no, a customized components is not immediately better.
Good Library UI components have, i18n, accessibility, and good mobile UX.
The comment "I can do a decent calendar in react in a few minutes" shows exactly this: it's infuriating to use on mobile.