What we can do, though, is think about providing more history in Onionoo, so that you can give up on archiving Onionoo data.
It is nice of you to consider that but it is not necessary (at least for me) I can life with my current hacks and other probably don't need more history, and you have already enough stuff on your plate.
Do you monitor onionoo for such problems ("relays_published" timestamp remaining unchanged for >1-2 hours)? Would you find something like that useful?
We do have such monitoring, yes.
So my email was redundant to your nagios check?
Would it be possible to publish these alerts on a mailing list? :)