Serve expired records from the cache, when DNS records cannot be resolved, like what happened yesterday with facebook.
That could be so cool! And they could make it a toggle on the dashboard
This is already the case for a limited duration, but that wouldn't have saved Facebook. It was not only a DNS issue.
NextDNS okay yeah, i think it was a BGP issue mainly (as far as I know) which also affected DNS (read it on cloudflare blog just now)
NextDNS So just extend the duration for as long DNS resolution is not working.