This is clearly not a great outcome. The browser monoculture probably doesn't help.

It's good to see servo getting closer to being usable in a browser. Makes me dream of Falkon or Konqueror being resurrected with Servo as the engine.

He is spot on again. The scope is what will allow to create flexibility in a fixed price project. This is what leads to the necessity to work incrementally.

A couple of flaws in this article I think. For instance, the benchmark part looks fishy to me. Also it's a bit opinionated and goes too far in advocating exceptions at the expense of error values.
Still, I think it shows quite well that we can't do without exceptions at all, even in the case of error values being available. In my opinion, we're still learning how both can be cleverly used in code base.