[pcwalton]

> By using much of the same code as another browser implementer, any browser vendor [hint hint] that still makes their own engine could reduce the resources they put on the foundations and web platform and put more of it on the product itself.

In other words, throw out all the advantages that come from using Rust in the browser in favor of a codebase that has a policy forbidding any use of that language. No thanks.

Furthermore, I have to note the irony that you say nobody else should implement their own engine when your team is the one that forked Blink from WebKit in the first place.