Yes, but even five years ago people acknowledged that it was going to take more than five years to write a browser engine from scratch. I'm on the record as stating in ~2012 not to expect a usable Servo any sooner than 2017 at the earliest (basing my estimation on the time it took to write V8 from scratch). And that was indeed optimistic, but we are seeing bits of Servo (most importantly WebRender and Stylo) being integrated into Firefox this year.

Hey, you weren't totally wrong. If you want to use a simple and fast web-browser on the bleeding edge of development, you can use Servo today. On all the computers I've tried it on it's been really fast, though with plenty of rendering issues.

It started in 2012. It was a total toy for most of that year, though. I would barely consider it a real engineering project in that state--heck, for quite a while it was a readme and nothing else :)