When you get that “out of space” error message during an update, you’re only “out of space” on the user storage partition,which is just being used as a temporary download spot before the update is applied to the system partition.Starting with Android 8.0, the A/B system partition setup is being upgraded with a”streaming updates” feature. Update data will arrive from the Internetdirectlyto the offline system partition, written block by block, in a ready-to-boot state. Instead of needing ~1GB of free space, Google will be bypassing user storage almost entirely, needing only ~100KB worth of free space for some metadata.
I promise not to make some snide remark about Android’s update mess.
In other news I download files to the free space on my hard drive.