Daniel Micay says he will retire from lead developer and move on to management role, yet I think he is still committing a lot of the code https://github.com/GrapheneOS/platform_manifest/commits/14

However, I do believe he is very devoted to improving the privacy and security for all users, despite his communication issue. So I personally still uses grapheneos.

Similar alternatives are divest and calyx, but it seems like graphene is still the best for me and probably for most beginners and experts alike.