For many Nexus 5 users, this may be bad news. Due to the power consumption bug of Wi Fi in Android 5.0 developer preview, Google is still trying to solve this problem, but the push date of Nexus 5 5.0 system must be postponed. The main performance of this bug is that after connecting to Wi Fi, the device will wake up frequently, resulting in increased power consumption.
As for the specific push date, it is not clear at present.
Via