I found that this saves a lot of battery. My old Motorola G5G is now sitting idle, and I had to charge it every 4-5 days. I found that if the phone is restarted and NOT unlocked, it will stay charged for more than 10 days. My best guess is that a screen unlock is required to start many of the OS-level services, which takes up all the battery.

If this is true, then the new update will save a lot of battery for those phones that are sitting idle.