Basically, after that you delete Monika in Act 3, she'll remain deleted for the rest of the game, including. However, if you attempt to insert a copy of her .chr file back, she'll say something about her not wanting to have her heart toyed with again and delete the file herself.
For the reset.sh stuff, that stuff happens only when Monika deletes the game through directly deleting all the files, which then, unlike when it happened at the end of Act 3, she wouldn't be able to restore the reality as the files are lacking entirely in that case.
My main argument is that she can indeed the universe on a Low 2-C degree without deleting the file of the game, as she mentions that time does not exist anymore in Act 3, and alongside the fact that Monika mentions that "nothing exists anymore", I interpret it as being a void without time, which would go in line with the "destroying the universe over and over" statement above.
I agree that I could've worded the argument better in OP, but the full explanation is in the sandbox in the new profile that I linked above.
Monika mentions that she can get
in danger if something happens to her character file
multiple times, but when it actually happens,
Monika describes it as painful, but doesn't truly disappear, existing as just a glicthed mess that happens when the game tries to interpret deleted characters.
Isn't reducing everything to a timeless void enough? Because a timeline cannot really exist without time, especially as a void.
They explicitly are, yes. Especially when deleting the flow of time in the game does not impact the Player, implying that each VM is its own space-time continuum.