Whenever Google rolled out an update, it also uploaded the factory image of the update on its site. Using the factory image, you can install the latest Android version on your device. However, it required unlocking the bootloader first which would wipe all the data. Now Google has started to upload the OTA update itself.
With this change, you could keep the bootloader locked and and still update the device to latest Android version. All you need to do is run a few ADB commands.
You can find the latest OTA file uploaded on Google’s website at this link. Google have also given a set of instructions on how to install the OTA files which makes the process much simpler.
This is a welcome change from Google. OTA’s are usually rolled out in phases and many users have to wait for it. Now users can install the latest Android version without having to wait for the OTA.