Since Bionicle physics are not the same as ours, who's to say that their time is the same. On Spherus Magna, they have longer days because of the planet's size, and probably different years too. For all we know, time in the MU could be longer or shorter than ours. A minute in the Matoran universe could be 30 seconds in ours. So, what if 1,000 years in the MU only equates to 100 or so years in our universe. Or, what if 1,000 years in the MU equates to 2,000 years in our universe? It's just a theory, but this could mean that some parts of the Bionicle storyline could be longer or shorter than we imagined, due to time differences between universes. Also, unless the MU time is based off SM time, how would the Matoran and other MUans have gotten used to living with longer days and years and whatnot? I feel like that would not be easy.