So if you had access to all of today's technology, and you were designing a software distribution mechanism....

You would put the software on little plastic disks that can't be updated after they are written...
Put those disks in expensive packaging.
Put those disks on consignment with a company that will truck/fly those disks around the country.
To other companies that will put the disks on shelves in stores where consumers can buy them (during business hours).

That doesn't seem very efficient.