Such as? Sure if you are operating on massive scale or have a remarkably steady load that 20% margin might be feasible, but that's the exception not the rule. Especially for a lone piece of physical hardware that can't scale up/down.
I'd be interested in an example of this, too, because I've been doing this for a while and I can't think of many--particularly in a modern, scalable environment (because Hetzner's APIs aren't great but you absolutely can scale automatically in their environment if you want to).
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