What do you think of so many characters suddenly disappearing?
They are part of the show and then *poof* they are not.
For example, Maggie is one of the main characters for many seasons and then suddenly she's not there. They just mention her going off to do something. I can't even recall what they said.
Dwight was a regular, he was a mole working with Rick and the crew against Negan. Negan is defeated and captured and *poof* no more Dwight. He is just off roaming trying to find his wife I suppose (why I have no idea).
Jadis. She was a main character and her role was growing and then *poof* she joins the helicopter people and flies off. Ok, who are they? Where is she going? What?
Three regular characters who just sort of disappear without any explanation (Maggie) or some very vague quest (Dwight is looking for the wife who disappeared first herself and Jadis is with the helicopter people in which they've popped in with a random helicopter for years and have yet to give any story to that. I guess if you watch for 15 seasons they may finally reward the audience with some story as to who they are)
They did the same thing with Morgan and after 4-5 seasons he suddenly turns up again. I suppose in 3-4 seasons one of these characters might just pop up again.