I also don't agree that modern software systems are in a better state to be preserved. In the 'old days' you could get a shrink-wrapped package that was the entire deal, docs, and media. Today, it's a blob that comes off the web and gets patched very frequently, as well as potentially being tied to the mother-ship to be functional. There are dozens (hundreds?) of products now that are devices that were tethered to dead back-end services (Danger Sidekick). How do you even start to preserve this?