Christian is insane. He made Builder (biggest libadwaita app), sysprof, libdpelling, gnome text editor, improved VTE and performance in various gnome (not only) apps using sysprof. He also helped with gtk. And now he's working on prompt. It’s funny how in various apps there is no session saving because designers didn’t come up with design for it yet and Christian just implemented it in prompt, text editor and builder.