Hi, after rooting or unlocking bootloader the update can be uncertain, sometimes you might not even receive updates. You will not get updates via OTA if you unlock the bootloader, It's better if you keep your bootloader locked, your warranty will be void as soon as you unlock the bootloader. It does not necessarily mean that you are rooted, the bootloader can be unlocked without rooting but the processes go side by side. You will not get any benefit if you unlock bootloader and do not root.