So we have now named the phenomenon that causes the Backrooms to look like places from the Frontrooms. There are currently two pages in the contest with different takes on the same phenomenon: Robert's Liminal Echo (Phenomena 7), and Pedder's Frontrooms Reflection (Phenomena 17).
Both are technically the same phenomenon, but each of them took a different direction for theorizing and speculating the cause for it. Robert's focuses on the idea that the frequent liminality gives the sense that it was intentionally made that way by someone or something, while Pedder's gives the idea that it is possibly a trick of the human mind, or some other, more coincidental explanation.
Personally, I lean more towards Liminal Echo's side of things. Not necessarily because I believe it was made by some being or intelligence. It obviously varies from canon to canon. The Pantheon is one such possibility for beings being behind its creation, or it could be an AI in a simulation. It's just as plausible that the places we see are pieces of different universes or timelines that collided with each other and became fragmented, like the Backrooms are some kind of multiversal sinkhole.
I don't like theories that lean into it being a simulation or following some kind of computer-like algorithm, as well as AI. And the Pantheon is too simple to be an interesting explanation to me. I lean more in a multiversal direction with it. The multiversal sinkhole one, or a multiversal liminal echo theory.
I like to think the Frontrooms and Backrooms are just two of many universes in that fictional multiverse, and that the Backrooms isn't only mimicking the Frontrooms, but other realities as well. The Backrooms are FAR bigger than we can imagine. We just inhabit the levels closest to the Frontrooms, so that's all we see it replicate. Whether realities are falling into the Backrooms and assimilating with it, or it's copying other realities, or even a bit of both, I find this the most interesting headcanon.
Level 234 also supports the mutliversal sinkhole theory, being a multiversal penal colony prison that fell into the Backrooms (can't get any more clear evidence that that). A lot of levels and entities seem to prove other theories as well, meaning it's more a canon thing, but I find this the most intriguing one. A lot of Robert's lore actually seems to work with this idea really well.
If this theory were true, it would also mean that no-clipping is falling out of one merged reality and into another. Since we can't do that very often from the Frontrooms, a universe being more unstable reality once its a part of the Backrooms makes a lot of sense. No-clipping could fit into such a narrative in almost any canon way it works.
If that's the case, does that mean the Frontrooms is the next closest reality to be swallowed up by the Backrooms? Is this why people are on occasion no-clipping to the Backrooms? I think that would make a very interesting story.
Anyway, those are my thoughts. What are yours?