For sure. I am making autonomous solar greenhouse, I could divide by 2 power consumption with this, and keep automation even when WiFi off.
Wifi only use is for sending data to my website. Unless automation control which needs to be always on wifi does not.

I there , is there a way to use the modem sleep with esp easy. Esp 8266 has 3 sleep mode : modem sleep 15 mAh light sleep 0.5 mAh deep sleep 10uah with modem sleep and light sleep we can still use control of GPIO . I've search a lot on the internet about this option in esp easy with no success. :cry...