A problem with a lot of folks' speculation about how Deltarune is going to end is that they're treating all meta brainfuck indie games as basically interchangeable and anticipating some sort of Void Stranger level ass-pull even though literally nothing about the game's narrative structure to date points in that direction.
Like, I'm not saying there's not gonna be a swerve, but there are levels of fuckery. "Rudy is the Roaring Knight" okay, sure, let's go with that. "Town is a simulation running on a computer in Undertale!Alphys' basement" you have played too much Animal Well.
Void Stranger is an pretty nonsensical comparison considering (Spoilers, play void stranger please, it's pretty incredible) diagetic ui is one of the most important parts of void stranger's worldbuilding and story, and we recently just got the lore drop that the menus are all diagetic in chapter 5
There is more evidence for simulation theory than there is for Rudy Knight. Undertale pioneered what is basically the modern standard for meta-subversive indie games. I feel like you included alphys here to poison the well of what is otherwise a completely valid interpretation of the games' hints and foreshadowing.
