What are the implications of Flatcar Linux's root filesystem RAID limitations?

As described [here](https://docs.flatcar-linux.org/os/root-filesystem-placement/) , not all partitions of Flatcar Linux's root filesystem support RAID 1 > Other system partitions, such as USR-A, USR-B, OEM, and EFI-SYSTEM, > cannot be placed on a software RAID array What are the implications of this? Suppose the root filesystem is configured with RAID 1, can either drive fail? Or if the drive containing the single copy of the above partitions fails, would the OS fail to function?