@Zacman:
Really do you think that is needed to test one revision of a chipset another year?
If this revision has (supposedly) removed a previous bug,you only need to try reproduce it
as in previous versions,then if you cannot reproduce it in,let`s say,one week,this can mean that the bug has dissapeared.
Also if you mean to find possible newer bugs that appears because of the correction done to fix the first bug,this only appears after a stress testing the machine,as,in example,doing things as compiling,etc.
With your meaning of testing,let`s say that nobody can sell a single chip never,because of possible bugs that can appear in daily use.