i think it's kinda funny, because Unity is very clearly inspired by some of casey's work
the big one is immediate mode UIs, which casey popularized back in 2005. Unity's editor uses it to this day, and if you do editor scripting, you'll be using it. for in-game UI, they switched to a component-based one, which also somewhat aligns with casey's opinions. and they shipped DOTS, which aligns even more with what he's saying
i think his lack of shipping is mostly because he switched to teaching and has absolutely no pressure to ship, rather than his approach being bad
the big one is immediate mode UIs, which casey popularized back in 2005. Unity's editor uses it to this day, and if you do editor scripting, you'll be using it. for in-game UI, they switched to a component-based one, which also somewhat aligns with casey's opinions. and they shipped DOTS, which aligns even more with what he's saying
i think his lack of shipping is mostly because he switched to teaching and has absolutely no pressure to ship, rather than his approach being bad