[sorcercode]

they are building their own editor (granted they didn't do it from scratch); they do build their own models (see composer);

they may not have done a lot of this from scratch but there's still a lot of innovation in what they're doing. they're also building a pretty fantastic product and clearly the leader today in AI innovation for IDEs.

may not be everyone's cup of tea; but i think you might be detracting some of their innovation.