PEARLS ==> SWINE
Counter experience: 4 years with Hetzner from small VPS to huge machines and based on traceroute servers in different sections/buildings of their datacenters. No hardware issues or hourlong downtimes you describe (other than myself messing up software RAID configuration).
Could you point to a Hetzner post where this has happened? (so I can reevaluate if I might move to OVH).