Is this reinventing cooperative multitasking + lack of process-based memory protection with more steps? The reason why (almost) everyone migrated away to preem

Is this reinventing cooperative multitasking + lack of process-based memory protection with more steps? The reason why (almost) everyone migrated away to preemptive multitasking + memory protection is because it only takes one piece of code behaving sightly different from what the system/developer expected to bring the entire thing down to a halt, either by simply being slower that expected, or by modifying state it's not supposed to.