Exactly
The Calif primary for R.Kennedy was in the middle of the primary season, not the end as it is now.
She has no more chances to catch up.
Also, I do not think the Democrats were using proportional awarding of delegates back then, so one could actually catch a leader with a few wins.
She cannot catch Obama in the delegate count, which is the criteria for awarding the nomination.
She has said Obama can be elected President so the reason for overthrowing the will of the pledged delegates (he is unelectable) doesn't exist.
Hillary is about to enter into political obscurity and she knows it.