I'm really quite curious why Google is still investing time into wave. It seems to me that either it is a worthy endeavor (which I think it is), or it isn't (ie, it should be scraped). But I don't understand scraping it and then revitalizing it soon after. Couldn't they have done the work the Apache Foundation will do faster in-house?
How can you "scrap" code? They certainly haven't deleted it, and just because they have stopped active development doesn't prevent them handing it all off to the Apache crew.
