While I agree 100% with Thom Hogan, the man doesn't live in Japan. Sony are a consumer company. And there exist no electronic companies in Japan that pay attention to customer retention and brand image.
Sony suddenly end-of-lifing the original A7 and creating an atmosphere of fear, uncertainty, and doubt regarding the A7r and A7s, isn't unusual. It's part and parcel of the game here.
But it shouldn't be.