Style calcs, diffs and storage?

[darcyclarke]

Just wondering what all the style calc, diffing and storing is for. If it's to apply style diffs on playback then I think we start to loose the point of the recorder/player.

My hope was for this to be modular enough that when I update styles I don't need to re-record a session. There's obviously some caveats to that, like changes to DOM or timing of animations/transitions, but otherwise the recording should just be replaying state changes. I could be wrong though. Let me know your thoughts here.