I don't know if that is it, as General Mills 'Gardettos Original' snack mix includes Worcestershire Sauce.
Besides, if they were trying to appeal to the widest variety of consumers (besides vegetarians) they'd probably exclude Wheat Chex (and anything else) for those with allergies, since they've already removed nuts.
Why can't General Mills be true to the recipe fore-bearers and just release a more authentic version as 'Traditional' (as most know it with Worcestershire Sauce, Peanuts, Pretzels (and maybe include Sunshine Cheez-It crackers) and ditch the rye chips and mini-breadsticks)?
They already have 16 different versions of Chex Mix. Given the modifications to the 'Traditional' variety, I imagine they'll introduce a 'Gluten-Free' version before releasing a version more befitting of the 'Traditional' name.
Here are a series of advertisements for the original Chex Mix from Life Magazine --
June 16, 1952 - Chex 'Party Mix'
September 29, 1952 - Chex 'Party Mix'
January 12, 1953 - Chex 'Party Mix'
February 23, 1953 - Chex 'Party Mix'
By the way, Corn Chex was introduced in 1958.
Ralston-Purina had other similar recipes --
April 21, 1952 - Chex 'Candy Balls' & 'Cheese Chex'
I was trying to figure out when Ralston-Purina started including rye-chips and mini-breadsticks to the recipe as this 1987 recipe still didn't include them --
Working Mother - December 1987 - 'Traditional Chex Party Mix'
I'm very happy the recipe was published, so I can make it any way I like.
What I'd like to know is why the packaged 'Traditional' Chex Mix doesn't include Worcestershire sauce...
If anyone is interested, here is Sichuan Pixiandouban Co., Ltd's homepage where you can read a little about their “Juan Cheng” brand Pixian Bean Sauce and their other products --
Here are some photos --
Plus an article by Fuchsia Dunlop --