..and when you are a customer there you know that you are core business and not just on some service that might be ended any day due to some strategic coin flip. I have no idea how these sidecar business ever establish themselves in terms of trust (same certainly applies to early years AWS)
And this is really more positioned as a rival to Hetzner than to AWS, for now.
the hype in terms of money they can pour here could potentially be a factor, as opposed to "feature completeness" right now.