[ObscureScience]

My understanding of this is that he managed to hype the language with certain killer features. A lot of people were enthusiastic and invested alot of time in learning and building in it. Evan than "suddenly" said they wanted to take the language in another direction and dropped some of the core features and pricipals that drew people in. While perhaps a mischaracterization, it comes a cross as a kind of "bait and switch" or at least undependable.