I wasn't a regular there beyond from occasional search hits. But presumably heavy users would want their contributions preserved in a way that's still useful for the type of people they wrote them for in the first place. An archive.org or torrent copy means they still technically exist, but not in a way that's helpful in a practical way.

It'd be like if Wikipedia suddenly closed down tomorrow -- prolific editors would take cold comfort from being told their contributions are still available to anybody who downloads an obscure multi-gigabyte archive file.