BTW, to fix these issues by software dev process is not that hard.

  * Start by use/create a full functional regression system. 
     * It is not that hard to create system level functional test coverage for wifi, Siri, search, etc. 

  * Require ALL SW developers to run full tests every evening, weekend. 

    Code are not allow to checkin or merge upstream if any test failed. 


  * The test system should submit report on all test scripts pass/fail and performance characterization to central server every night.