I expect they’re also getting higher demand for older models. I wanted to get an Xs but when I held the smallest model in my hand it was just too monstrously big.

I want a phone not a portable TV. It’s the first time I didn’t buy the latest phone.

The first part of the article seems to suggest that Apple overestimated demand for the newest phones. It could still be "the best selling iPhone of all time", but they had expected it to sell even better than that.