Subpixel antialiasing of fonts is a pretty standard feature for a few decades. Without it, text can look fuzzy on certain displays.

> does we run game engine for code??

Zed literally does this; they render their UI using a graphics library just like a video game.

It's fun to see "GPU accelerated" and "like game engine" when literally every application is rendered the same way with the same APIs.

Last I checked I don't create a GL context to make a WPF app.