If you're using the cloud service directly, it's possible. But with the edge agent, all access checks will continue to function even if the cloud service is hard-down.

And as others have mentioned, we're also planning to offer on-prem/private cloud deployments in which case the entire stack would live on customer infra.

Like Akajla said, a local Policy Decision Point (PDP) can solve outages really well.

An open-source event-driven engine like OPA+OPAL which can keep the PDP up to date is an easy way to approach this in scale (that's what we use as part of Permit.io)