My point was that most people wouldn't get much value out of it aside sentimental reasons, and you can back up your own Reddit posts if this matters to you instead of backing up the entirety of it as this is the only part that should matter and should have a smaller fingerprint. If Reddit goes down for whatever reason you could try to merge with others, too.
If you try telling a historian in a hundred years time that there wasn't anything of value worth saving on a site where millions of regular people had conversations about pretty much everything of relevance to life in the early 21st century they will robustly disagree with you.
The groups.google.com search is working again. Why not?