&gt; Of course small phones would fare badly when nothing good is for sale!<p>It sounds like you&#x27;re treating the introduction of new phone models as an exogenous event, but that&#x27;s crazy.  That&#x27;s like saying &quot;Of course people don&#x27;t ride horse-and-buggies any more; hardly anybody make them!  That doesn&#x27;t mean cars are the future.&quot;<p>If manufacturers are introducing fewer models, it&#x27;s because there is reduced demand for them.