It's possible but not trivial. If a programmer has never been exposed to any memory model other than the Intel PC model, they are in for big surprises when they

It's possible but not trivial. If a programmer has never been exposed to any memory model other than the Intel PC model, they are in for big surprises when they start using POWER. When will write from thread A be visible to thread B? Can this atomic load pass that other load? For multithreaded C++ programs these are tricky. For other languages that always communicate between threads using messages, maybe not, but also maybe you're favorite language runtime doesn't exist on POWER.