Reality and innocence

Rating: 9/10 (7 August 2019)

After having seen the movie for 2 times already, I've read more than 100 reviews of it, everywhere that they're available: professional and audiences.
Thus, I feel I have something to add.
Reality: the issue of reconstruction of 1969 reality as alt-reality is questionable. I think that the alt-reality that we can see in OUATIH is an alt-reality of any reality "in the last 50 years". The story is "anchored" in 1969 for certain practical purposes, however the main story is about generations, paradigms, shifts, redefinition of oneself. The "aging and obsoletion" motive is as old as anything, it doesn't necessarily apply to Hollywood or to a certain period of time. The catch is if (or how) to overcome such tendency in a person's (actor's, artist's) life, or not to overcome, of course.
The other theme, obviously, is innocence, and the loss of it. Or not, again. Since the last 2 days I've done some research on Sharon Tate's life up to August of 1969 - whatever is actually available on the Internet. The (partial) outcome is that Margot Robbie cannot really represent Sharon Tate. She cannot recapture the lost innocence.
When we look at the combination of the above themes, it is obvious that: the movie should have been set exactly in 1969, that the laid-back presentation of Leonardo's and Brad's roles could be put in that context only, that QT is making full circle of his canon exactly with this movie: he cannot make another movie in the same set-up, and this alt-reality is the ultimate one, and the innocence has been lost then and there, probably forever.
The real question, therefore, is: what will QT do next?