Casey is a seasoned dev in the scene, with a decent resume of games and an even more impressive resume on knowledge in engine tech. Most notably, he's working on a new programming language called Jai that is tailored for game development.

So he may not be the most appropriate person to ask for game engine advice (since he says in the article, he makes and rolls a lot of his own tech), but he will inevitably be asked for his thoughts and advice on the situation regardless.