the ghost stuff has definitely not been solved, per se–a lot of the legacy fandom would probably say hussie phoned it in there for various reasons, though I would definitely not agree.
To answer your questions:
Is the ghostrealm conditional to the universe that spawned it, or is it truly infinite?
The furthest ring–the black void surrounding all Sessions and Universes–is truly infinite. The eldritch horrorterrors that inhabit it are also infinite, since they’re part of Sburb’s design.


The dream bubbles, and the ghosts that inhabit them, however, are conditional to the universes that spawned them. The horrorterrors glub up those bubbles, but as far as we know, they don’t do so for every session.

They glub up the afterlife for our Heroes thanks to the influence of Feferi Peixes-the Witch of Life. She was actually raised by a horrorterror as her familiar, and is able to commune with the gods to request they establish the bubbles.
You could read this as Feferi changing the nature of Life in Homestuck, granting everyone who perishes a sort of second life in a weird limbo of half-existence.
Later parts of the story suggest that the horrorterrors were manipulating Feferi and all of the ghosts of the afterlife to protect themselves from Lord English, and to serve their mysterious goals by both A) Ensuring Lord English’s destruction and B) Enabling his creation in the first place.
Which brings us to…
is there a hypothetical alternate-alternate world where the conditions that rolled the troll-verse are different?
No, definitely not. That scenario is theoretically possible for other species elsewhere in PS, but not for trolls–or humans, for that matter.
We’re not sure what the limits are on variations of existence and choice in Paradox Space, but Aranea tells us there are some, and goes into some of the philosophical problems that come with the admittedly attractive idea that there might not be any:

But really, the problem is logistical. Having even potentially infinite variations of a particular universe isn’t necessarily impossible in Paradox Space, but it is impossible for the worlds and characters trapped in Homestuck.
Because of Lord English.

Aranea gives us this little spiel about how the choices and possibilities available to everyone in Paradox Space are limited by the fact that PS itself is using the characters to propagate its own existence. Only choices and scenarios that allow reality to exist and continue to propagate are allowed to flourish.
And by the very nature of his existence, Lord English traps every universe and person we see in the comic in existential stasis. He’s a notable influence in the Alpha Trolls’ session through Kurloz, Damara and Cronus, and he’s THE reason Alternia exists as it does and the Beta trolls are who they are.
He made trolls what they are, so their reality can’t actually exist unless he exists,
and if trolls existed in any other way they wouldn’t create and interact with the humans the way they do, meaning the humans wouldn’t eventually create LE, meaning trolls wouldn’t have existed in the first place.
It’s a grandfather paradox, but on a cosmic scale. Trollkind may be able to exist in varied ways from Earth C,’s Troll Kingdom onwards, which is now free of the influence of Lord English. But its origins–and those of humanity–are forever entangled with Lord English. Them’s the br8ks.




























