Thank you @baris for the swift response. I have no need for backwards compatibility in my theme, so I think I will hold off on bigger changes.
@Rusdy-MT It seems to me like they have revamped this option. It's now some kind of "group privilege" now. You can toggle it under ACP -> Manage -> Privileges. This came out of nowhere for me as well...
@arutemu Link. Nodebb supported Nodejs 8. I install Nodejs 8 for NodeBB and Ghost, this is working and look good!