In 2017 Apple released iPhone 8 and iPhone X (10) at the same time. Even within the iPhone line-up it's confusing.
And what about the iPhone XR that is a lower-end version of the iPhone XS, both released the same year.
It's not that simple to understand.
A couple one off models over a decade and a half of apples USA iPhone sales do not prove some point that the average consumer is unable to flag and identify differences in products they are considering purchasing.
And even then, in comparison to the products they were being sold alongside, their place in the product line was clear even if the pricing at the time of purchase wasn’t enough of an indicator.
🙄🙄🙄