It's such a shame that what was shipped there was so far off what the designs had suggested might be possible [1]

Two years ago we were told:

We're going to build it right, and that means rewriting large pieces of our codebase. We'll ship the remaining stuff when they are ready.

I'm not sure how much more of the designs have actually been realised since then?

[1] https://news.ycombinator.com/item?id=36664515