I've noticed this in the past. Subscribing to Hanlon's Razor (never attribute to malice that which is adequately explained by stupidity) I always assumed it was

I've noticed this in the past. Subscribing to Hanlon's Razor (never attribute to malice that which is adequately explained by stupidity) I always assumed it was because users were upgrading to the next major release of iOS, which had additional features, and was optimized for the next generation of iOS devices (not the current).