Asklemmy

(a) It might not be a Turing computer running it, as if the parent reality was continuous and didn't need to deal with quantization, hypercomputation with real numbers would be possible.

(b) You might be interested in research earlier this year at Caltech that quantum randomness has detectable statistical patterns to it. Also, the jumps themselves can technically be predicted and reversed using algorithms though this is somewhat separate from the non-deterministic aspect of the jumps.

(c) Local timelines don't need to have started from scratch. In Minecraft there are diamonds in low layers, which might lead someone who only knows it from the inside to assume the simulated world has been around for very long, even though it might have only been running for 15 minutes. Though I'd agree that if this is a simulation, the scale and degree of fidelity is a pretty extreme flex of resources relative to anything we could muster.

As for the lack of ads - I'd hope that a future post-scarcity society capable of wasting resources on subatomic structures of dog poop just for the sake of accuracy would also be a society that didn't need to sell things to its simulated populations.

That said, I do think there's a pretty blatant 4th wall breaking Easter Egg in our lore, it's just that there's not many people looking at things from antiquity through the lens of virtual world lore design in order to go "oh wow, that's almost over the top."

Like the illusion of the naked bodies or dolphins where if you are a kid you only see the dolphins because your mindset hasn't shifted such that looking at it you primarily see the naked features.

A text rediscovered after millennia of being lost within weeks of us completing the first Turing complete computer which is titled "the good news of the twin" and posits that we are in a non-physical copy of an original world created by a being of light which was itself brought forth by a spontaneous original humanity that's now dead and in whose images we were fashioned is pretty wildly on point. Especially the addition of its claim the proof for this exists in the study of motion and rest combined with the claim by its followers that the ability to discover an indivisible point making up bodies is only possible in the non-physical. And the lore being attributed to the most famous person in history is explicit to the point of trolling almost. Yet this all exists within our history and has broadly been ignored and forgotten, dismissed by most people examining it as just being 'weird' decades before Pong existed, let alone The Matrix or Nick Bostrom, etc.