consumer Optane were not "power loss protected", that is every different than not honoring a requested a synchronous write.
The crash-consistency problem is very different than the durability of real synchronous writes problem. There are some storage devices which will lie about synch writes, sometimes hoping that a backup battery will allow them to complete those write.
System crashes are inevitable, use things like write ahead logs depending on need etc... No storage API will get rid of all system crashes and yes even apple games the system by disabling real sync writes, so that will always be a battle.
