Given that you'll never be able to prevent copying, the question is, what can you do to minimize it? What can you do to make consumers happy enough with legitimate use of the system that they'll be willing to pay for it?
The '80s seem a real positive force. The '70s were deadening, in a lot of ways.
You can always improve on something, the technology is different today, but I would leave it well alone. If there was something that was incomplete, that might be interesting... because I do that on my website.

