It's definitely worth the multiplier. But that's not the right question imo. The question is if his well being was affected by that responsibility. From his post I didn't get the impression he was under a lot of pressure (unlike a senior FAANG engineer...). He worked hard of course but that doesn't mean he suffered. He just lost interest.

I'm not saying running a company is not stressful. Of course it is. Even is it's yours and no one can fire you. But it's very different when you're the one who is making the decisions and not depending on other people and politics.