It would obviously not be in our best interest to offer a complete site archive even if we could but given how often content is uploaded, it's not really feasible regardless. As for a download all option, this request comes up every once in a while but is too much of a drain on server resources to offer as it requires dynamically creating zip archives of dozens or sometimes even hundreds of relatively large files so this isn't something we'll be offering either.
If it makes you feel any better, I have a full backup of the site in multiple locations and have no intention of ever letting the site die.
If it makes you feel any better, I have a full backup of the site in multiple locations and have no intention of ever letting the site die.