[augustus0]

That was my reaction to the article as well. The amount of work being done here for Servo (and which has been done in other browsers) is hugely impressive, but this problem feels a little artificial — we could have build the same web that we have today with half these options and not even have lost much in terms of ergonomics.

I wonder if some kind of "Expedient CSS" might be possible as a way forward. Site developers could opt themselves in with a comment tag and promise to use only a subset of CSS features and only simple cascades (maybe none) in return for better rendering performance. A little like what's been done for JavaScript with asm.js.