A renpy game usually comes with some nice features like "roll back" and "skip".whats wrong with the code?
These features come for free. As a dev you just have to do nothing! Really nothing at all!
But if someone decides to write really shitty code, "roll back" would break this shitty code.
Instead of fixing this shitty code they spend years(!) trying to block the "roll back" feature.
But a renpy game without rollback and skip not is worth playing.