>Here's the thing though: What this Servo dev thought of as "production ready" and what the Gecko team thinks is "production ready" are very different things. In Gecko-land, it's not enough to do best-practice things like continuous integration, regression tests, error handling, etc. For Gecko, it's also about compatibility -- both with 25+ years of web content (much of it malformed) and a wide range of supported combinations of operating systems and hardware.

>If you're working on Servo, you can be much more strict about what hardware combinations you support and what kind of content renders well. Look, there's a reason that the lineage of all widespread web engines go back 20+ years: it's much easier to incrementally improve that engine while ensuring that you're not breaking anything than it is to start over from scratch.

>I would also like to point out that you don't have to take my word for it: It has taken at least 3 years (probably closer to 4 years) to get WebRender ported over to Gecko from Servo and get it running well enough to the point that we can start saying that it will likely reach 100% deployment within months instead of years.

>My point is that, while Servo was great for demonstrating new ideas and producing eye-popping demos, it was not going to replace Gecko anytime soon, regardless of what those few Servo developers thought. In all the time I've worked at Mozilla, I have never once heard anybody in charge of Firefox say that we were going to do a wholesale swap out of Gecko with Servo.

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