At this point it doesn’t seem like it’s a good idea to use the official OS images. They’re probably decent enough to verify the basic hardware works, but the community images are more up to date and functional. And based on posts to this forum, there seems to be a known issue with the display driver on CM4 when using the official image anyway. So there doesn’t seem to be a benefit to using it, unless you want to try to piece together a more functional OS using it for educational purposes, instead of using the work that’s already been done and confirmed by other users. 