I say ROTJ marked the point George Lucas decided that Obi-Wan’s robes from the first movie were the official Jedi vestments, as evidenced by Anakin’s ghost, which retroactively creates a problem.
If Obi-Wan was in hiding why would he still be wearing the very robes that would give away his identity as a Jedi?
idk if Im in the minority, but if feels like Jedi is really what kicked off the prequel era, and really set in stone what the universe is, compared to “Star Wars” and “Empire” where so many possibilities were open and they could go in any direction