As of a few minutes ago (Monday 8/20/18 8.15 am EST) this is what Marriott said:
Reservations, members accounts, and other major systems functionality are online at this time, but you may experience intermittent issues or delays. We appreciate your patience as we work to fix these issues as quickly as possible.
My SPG side is still very messed up, without showing my Lifetime Platinum Status which now really should be Lifetime Platinum Premier Elite (770 nights and 14 years). What are the problems everyone else is seeing? Are you a frustrated with the lack of communication from Marriott or an honest update page, so we would know what is really going on and being worked on?