There are very real practical reasons why AVNs often do things like this, though. Downloading a 6 GB file can take hours, depending on your connection speed. If the first half of the game never changes, why waste those hours re-downloading it for every single version update? (Also, although this particular AVN doesn't do so, a lot of AVNs use Mega, which arbitrarily makes you wait several hours if the download size exceeds four or five GB.)