I betmy 4yo will open up lego 4+ again while I am downloading. Generally he hits cancel and I discover I am not downloading. He has found all my hiding spots because of the charger I love my mini Geeks.
I'm not worried, Tim Cook seems like a guy who knows how to handle a big load!
if update is more than 50MB I think a trip to starbucks to snag some free wifi is in order.