Why do you think he didn't build a browser?
To me this feels like like getting a free cheeseburger, adding a leaf of spinach to it, and then saying you built a cheeseburger. But hey, maybe you want a cheeseburger with spinach, and you don't care whether other people think they "built" the cheeseburger or not.
... is a gigantic amount of work, indeed.
>like getting a free cheeseburger, adding a leaf of spinach to it
If that cheeseburger was the size of an office building, and your spinach leaf was particularly small.
Building a control around a render is still neat, but it's not baking the thing from scratch.
I think part of the pushback in these comments is that as devs and hackers, a lot of us want to see new rendering engines. Even if they're basic or just render web data differently, it'd be a good change from the narrowing and limited web rendering landscape that's out there.