[Vecr]

I don't see how that could provide an alternative to Novikov fixpoints. You can't control the initial conditions well enough, so the Novikov fixpoint you get is one where no observable time travel has ever occurred.

I think you're getting too attached to fixpoints and worldlines, it would be better to think through the actual computer program the simulation uses.

[samyar]

Good point, but I believe that this is what the anime intended. Because if you look at it, this is what Okabe does, changes the past with the least effects. You are totally correct this amount of changes is actually a lot