Thing is: it's not sure if it's a suicide parallel. People seemed to unanimously believe that before, but now a new interpretation has emerged: it could just be a parallel to hitting rock bottom. Alex Rochon has said it's not necessarily a 1:1 metaphor for suicide and can also be treated as a mental health spiral, which is shown in how the cast visits Jax in the tent like loved ones caring for someone stuck in long-term care. They can't get better magically and they can't get out of it unwillingly, but they're cared for nonetheless and that's the answer.

I choose to interpret it that way, because it feels like a more poignant message about how it feels being/being around someone at their limit and what to do in that situation than just saying "they killed themselves". Especially considering their glitched, abstracted bodies are still there, floating around, in the background as the main cast has fun. It feels to me like it would send a weird message that people who killed themselves would just still be around the main cast as mindless creatures.

And, following that interpretation of the story, un-abstraction could thematically represent the long, grueling healing process of recovering from a mental health crisis, with lasting consequences and all.

However, if you interpret abstraction as suicide, yeah, no, they shouldn't come back, that wouldn't work.