On Mon, 10 Oct 2011, Keith Bachman wrote:

> USB flash-based drives is where things are headed, I think - for retail 
> purchases, anyway.

[snip]

> Thumb drives, while more expensive than DVDs, are infinitely more 
> reusable, and update-able.

But the fact that they can be altered makes them undesirable as a means 
for distributing software -- the producer of the software wants to know 
what the customer is getting.  You'll want to have an unchanged original 
copy of the software you purchased.

Also, I think the cost of flash drives is very significant.  To use a few 
DVDs instead would save a lot of money.

Mike