I suppose a more important reason is the "not have to bound anything" part. OS kernels almost definition don't know how many objects will be created. Implementi

I suppose a more important reason is the "not have to bound anything" part. OS kernels almost definition don't know how many objects will be created. Implementing queues as vectors of pointers will require dynamic allocation and/or introduce many more failure points when going out of resources. With linked lists, once you have an object you can always append it to a linked-list queue.