1) There is no uniform agreement about the state of Servo. Some are more optimistic than others.
2) There is a number of unknown unknowns here; that's what makes it a research project and makes it hard to roadmap. For example doing parallel layout of CSS involving floats is an actual research topic people are currently publishing papers on...
Does it even make sense to parallelize the layouting? When does it take longer than a few milliseconds?
I'd rather see DOM-updating (e.g. via Javascript) in parallel to the rendering. Although, that already leads to problems since rendering changes to DOM as well.
1) There is no uniform agreement about the state of Servo. Some are more optimistic than others.
2) There is a number of unknown unknowns here; that's what makes it a research project and makes it hard to roadmap. For example doing parallel layout of CSS involving floats is an actual research topic people are currently publishing papers on...