No lol GrapheneOS is a different project run by developer divas. It’s super secure, but only if you use a Google phone, which totally makes it safe. The television ad told me so.
LineageOS is the main pure AOSP ROM, over all the others. It’s still chugging along quite fine, albeit its customisation options have always been fairly limited compared to other custom ROMs.
If you’re using LineageOS4MicroG and complaining about updates, well, you wouldn’t be the first. This fork follows the main tree but updates veeeeeery slowly, such that there are always people asking if it’s dead. So far, after every one of the countless times that’s happened, it’s still been going - so it probably still is.
I personally run DivestOS and feel happy. No developer drama, and I’m not locked in to Google hardware. Ultimately though, all Android phone hardware manufacturers play the same games. It sickens me that so many of them require you to ask their permission to unlock the bootloader on the device you own.