guix:
There is a website/forum for the ESP8266 so why don't you go there instead?
I suspect the answer to that is that it is possible to program an ESP8266 with the Arduino IDE.
Personally I am happy to see the Arduino IDE used as widely as possible.
I did suggest, in the Website and Forum section, that a new section should be created for ESP8266 projects (just as there is for the Yun and the Zero, for example). That way the expertise could accumulate in one place.
...R