Well, interviews are slowly being done away with. It is being replaced with "Additional Documents" (all pages of passport to be sent to IRCC via email).
Other than that, there's a bit of a wait after the test. For non-Quebec applicants, the next update would likely be "Decision Made" on ECAS and concurrently, Language, Physical Presence and Prohibitions will be set to "Completed" on the new status dashboard. After that, there might be a bit of a wait again. "Citizenship Ceremony" will then be set to In Progress and you will be given the date for the ceremony.
From what I have observed, some early 2020 applicants (Jan to April) have received oath invitations for late July and First/Second week of August. I'm not sure what the oath timelines will look like for us unless some of us start getting oath invitations.