At the medical office where I work, I happened to notice there was some Italian dressing in the fridge that was “best if used by” six years before. I almost felt bad throwing it out, considering it had survived at least three corporate mergers and a buy-out.
Personally, “canon” is the six movies Lucas made. I watch the rest, enjoy some of them (“Rogue One” and “Solo”), but the “real story” closed with “Return of the Jedi”.