[botskonet]

We abandoned it at v4 because it just doesn't fit within the modern landscape.

Building the DOM via JS wasn't going to work for us. We had to re-learn how make simple things and we were at the mercy of the Ext API. The resulting DOM was incredibly bloated, different in IE, and was a nightmare to style.

Template-driven apps like Angular, JSX in React, Vue, etc are much easier to use overall. Less to learn, faster adoption for new developers, cleaner separation, better portability, and small, clean, and consistent output.

To be fair, the original authors of our application had little idea what they were doing either and misused/abused Ext, which made everything 100x worse.