We have dual redundant links via separate physical hardware from our side to our Tier 1 ISP. We unexpectedly discovered their equipment is a single point failure.
Our Tier 1 ISP has just confirmed hardware failure of the upstream router (after 16 hours!) and will provision new replacement device once it has been shipped to site.
I wonder why the OSM team isn't calling the ISP out by name. Not having on-site spares at a Tier 1 is just, insane.