The answer to that isn't putting all stores but one out of business, it's having a single-sign-on provider. Also, I doubt you would criticize an embedded OS fo

The answer to that isn't putting all stores but one out of business, it's having a single-sign-on provider. Also, I doubt you would criticize an embedded OS for only having process scheduling and hardware access, because that's probably all it was designed to do. Similarly, a low-cost store may want to skip on providing all those extra features so they can keep prices down.