I thought you would like to know have been into android quite a bit to use TakeOut and other Google features in order to back up our phones. We got one firmware update from KitKat to Lollipop then one to Marshmallow so historically thinking i figured we would get another a year from now if ever. They really are not good for the hardware as temps reach 72 degrees.
I don't know why but we just got another one week after the marshmallow one which is typically too soon.
Hope you have been ok.