I keep seeing people saying this kind of thing (about other games too, like the Fallout 76 beta), but isn't that only a few hours' worth of download? Like sure it's not right at launch, but it hardly takes up the full 4 days.
*Edit - Semi-related, the last time I preloaded a game on Steam it took longer to decrypt the preload files than it would have to just wait until launch and download the regular files.