The flaw in Star Wars is that it began simply, Good vs. Evil. More story, more complexity. As always, we grow from childhood polarizations to dealing with shades of grey. Mike Moorcock began writing of Law vs. Chaos and their interaction. That exploration went deep, but it turns out the structure of reality is not binary, it's trinary. (We should have guessed!) Between Law and Chaos is Balance. And between Jedi and Sith is Bento. This is canon, as it is from the animated show, but so far not brought up in the films. What was Luke looking for? The flaw had become apparent to him, the answer was not in the way the Force had been used in the past. There must be a new way, as Dark versus Light always led to conflict. When Snoke suborned Ben Solo and he killed the trainees, Luke had to find a solution. Hence returning to the original Jedi Temple, hence his isolation, and hence his not wanting to give clues about where said Temple was to anybody else - like Snoke or Kylo Ren. So he sought the Bento. (Which, as it came up in SW Rebels, was perhaps not a Lucasian term, but from a later writer. I suspect influence by the concept of the 'bando'.)
It may be 'the last Jedi' or 'the last of the Jedi'. As attractive as the mythos has been, it can still mature. Perhaps the idea is to move ahead to the next level, what happens to an elevated Jedi. Maybe they will call them Bento, hopefully something else cool.
Star Wars is space opera. We proceed towards the final act and the coda.