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Hetzner only has one Datacenter/AZ per region. So you either risk a single region failure taking you down, or you lose performance from transferring data to another location.

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These physics are exactly the same with AWS et al.

AWS has multiple AZs in a single region. I believe these are closer together and thus have lower latency than the three European Hetzner locations.

I think recent events (and quite a few before that) clearly show that you don't put mission critical stuff in only one AWS region.

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