So it turn out that even if he's opinion on Rust is correct, he would still have been much more productive using it than trying to build his own language for a decade…
(But he already shipped his masterpiece and he's a millionaire so he gets to chose his full time hobby as he wishes)
Not to mention smaller projects like 'Braid- anniversary edition'.
Even in hindsight it's hard to judge whether building your own engine was good or bad decision, and we are nowhere near "the hindsight" level of knowledge.
A machinist who retires from running lathes and goes into the lathe-making business has reached the pinnacle of that profession.
I wish. As far as I can tell he made a single hour long video shitting on rust and now he's the enemy of the cult. That's hardly spending the last decade sitting being mad over rust.