It's more than an overlap: I would argue that there really is a _spectrum_ of interaction wants and needs. On one end, you have people with no vision at all. S

It's more than an overlap: I would argue that there really is a _spectrum_ of interaction wants and needs. On one end, you have people with no vision at all. Some of them prefer extremely high speech rates. Others do not. Some may additionally have other interaction limitations (motor control, etc). Then, you have sighted people who cannot look at a screen at the moment — e.g. because they are driving a car, because their device is at some distance, or because the device doesn't even have a screen. You have sighted people who get tired reading long form text, or who need text read back to them as they type to support their spelling. So screen readers are absolutely not a one size fits all product. Even Apple provides a ton of user configurable choices for their screen reader.