Honestly, if anything the library of congress should be operating a system similar to the way back machine. Isn't preserving historical information one of its objectives? And what libraries do in general?

But I'm very in favor of maintaining "the record", as it were, for government websites. If we can have changelogs on bills then we should elsewhere. It informs the citizens of the actions of our government. What has changed and "who done it". That can go both ways and I hope it would incentivize those trying to actually do good and not just treated as a liability.

Hell, if the NSA can just gobble up all the Internet traffic and store it on servers in Utah then the least we can do is make public records accessible. The archival work has already been done and we've already paid for it