In our case the window was 4 yearsNothing short of bongers-style drug cheating can cancel out a premiership but you can definitely waste a potential dynasty window and make a single premiership a symbol, at least retroactively, of 'what might have been' rather than the all-out celebration it should be. For example (speaking of the bongers) esserdon in 2000 and collinwood in 2010. Both of those teams should have won at least 2 premierships.