@Ashley Zhao
As far as I know, minio is a full-fledged open source storage for the s3 protocol.
First of all, in the cloud-native era k8s is the cornerstone of cloud-native, k8s is equivalent to the operating system of the cloud-native era, distributed systems on cloud-native is the trend, that's why there are so many (and more and more) cloud-native based database products, you can not think that so many cloud-native based database are unstable products.
Secondly, even if k8s is withdrawn, and can not be considered cloud-native database will lose data, their data storage are responsible by the PV, k8s withdrawal does not affect the behavior of the PV, and even forced to delete the PV its saved data will not necessarily be deleted, which is also determined by the PV reclaim policy