There are multiple aspects of working with the ESP8266: You have installation of the hardware package which, would fall under Installation & Troubleshooting or Other Hardware Development. You have WiFi, which would fall under Networking, Protocols, and Devices. You have specifics of the microcontroller, which would fall under Microcontrollers. You have the other components on the board, which would fall under
General Electronics. Then you have programming, which would fall under Programming Questions. It seems better to use the appropriate topic rather than lumping threads about any of those together just because you happen to be using an ESP8266. This way you end up getting the attention of the people who are interested in that particular subject.