I think some people think of 5E less as a flavor and more as a foundational thing. Like, since you brought in flavor as a metaphor, I'll use expand it into a cooking metaphor. I have one basic recipe for meat with a pan sauce: The basic recipe is to season steaks with salt and pepper, cook them in butter, saute some shallots, deglaze with whiskey then broth, then mount/finish the sauce with Dijon mustard and cream. I can spin that approach bunches of different ways: I can change out the meat, or the seasonings (my own riffs on Indian, or jerk, or Cajun, or Old Bay, or Mexican ...) or the deglaze, or swap out the shallots for something else, or finish the sauce with something else. If I season pork chops with a funky tropical coffee rub, cook them in vegetable oil, saute onions, deglaze with rum, and finish the sauce with hoisin sauce and peanut butter, I'm still doing the same things but I'm making a radically different dish. I think some people would look at the ingredients and say it's something entirely different; I think some people would look at the process and say it's mostly the same.