If there's no continuity then... what's the point exactly? Reset buttons are my ultimate pet peeve when it comes to narrative devices. It just makes it harder to care or be engaged.
A continuity constantly being written by hundreds of different writers over five decades is of course going to change and shift, since it didn't come down from on high carved into stone tablets. Errors and contradictions are to be expected, that's just the way life is, so long as those who work on developing stick to the core concepts and direction I'm usually happy.
Those that can't think of anything more interesting or engaging than just pressing the reset button are just being lazy, whilst destroying things like character development and emotional impact, so that you end up not caring about characters.