No, the iPhone sold well, but it was being compared to a quarter with an extra week in it. They actually sold more per week than the year before without taking price into the picture.
I don't know how you can say most aren't using Siri. I doubt that. It is great for music, reminders, alarms, calendar etc. It has competitive advantages on the watch, Airpods, iPhone, iPad, etc. I just don't buy that people aren't using it. Personally, I use it more than Alexa because it is built into the watch and iPhone while the Dot does nothing for me until I get home. Not to mention that Alexa isn't used by nearly as many people because it isn't in very many homes compared to the iPhone/iPad/Mac/Touch combo.
Note: Apple has the following comment on "active" users of Siri:
"
Siri, now actively used on over half a billion devices"
https://www.apple.com/newsroom/2018/01/homepod-arrives-february-9-available-to-order-this-friday/
They were selling the iPod to push iTunes. It isn't a services company. It is a product company that uses their very popular products to push services. They make most of their money on products. Not even close. What they are trying to do is expand services, so they don't have to worry about selling more and more iPhones in a saturated market. That doesn't make services more important than their core business, though.
We don't know how many Echos sold, either. However, analysts are able to estimate the numbers by extracting what companies say, the product category growth, etc.
Just to make this easier to grasp, they made over 85 percent of their revenue from products. My guess is the services like Apple Music and Apple Pay would die without the iOS platform:
https://sixcolors.com/post/2018/02/apple-reports-its-holiday-2017-earnings-today/