Spoilers all over this thread now...
It's not irrelevant because a stable era only happens when the planet orbits one of the suns which will depend on the motion of the planet too.
It's not irrelevant because a stable era only happens when the planet orbits one of the suns which will depend on the motion of the planet too.
The motion of the planet is completely determined by what the three suns are doing, and their motion barely depends on that of the planet.