I'm shocked that ast based edition is back. Many people were against this, lots of grammar based tools sadly failed (for better or worse reasons). In a way it s

I'm shocked that ast based edition is back. Many people were against this, lots of grammar based tools sadly failed (for better or worse reasons). In a way it seems that the mainstream rose above regex level tree manipulation, and that even html/css made people start to think in subtrees rather than linear data. This might reduce efforts a lot, whether it is for edition or analysis. And this fine grained source interaction was why I was so enamoured with emacs in the first place. It was such a deep feeling of control compared to anything I tried in the late 90s.