Check the sell-by date!

In a rare reversal, my wife was the one visiting Walmart yesterday, and she sent me a picture of one of her acquisitions:

Your reaction -- "huh?" or "oh yeah!" -- tells something about your age.

According to Wikipedia -- amazing, aren't they? -- this actually came out late 2010, but I guess it's only just now filtering down to the provinces. Apparently the Taco flavor was phased out around 1977.

Numerous impromptu online support groups have sprung up over the years among devoted fans who miss the original Taco Doritos flavor formula. Reincarnations and relaunches of the Taco Doritos, including the recent "Back By Popular Demand" campaign, did not recreate the original Taco flavor. The Taco chips included in the Zesty Taco/Chipotle Ranch "Collisions" bags were very close to the original, but were since discontinued in most of the country.[8]In late 2010 the Taco flavor recipe that was used in the 1980's returned in a limited edition "retro" styled bag incorporating the original Doritos logo, and in early 2011 the company announced that this incarnation would remain in the permanent product line-up.

The Taco flavor was pretty awesome, so I'm glad to see it return, though not to the extent that I regret having omitted to join any online support groups.

... From the article, an interesting Daubert "angle" (heh):

The company was sued in 2003 by Charles Grady, who claimed that his throat had been damaged because of eating Doritos. According to him, the shape and rigidity of the chips made them inherently dangerous. Grady attempted to admit into evidence a study by a former chemistry professor that calculated how best to safely swallow the chips. The Pennsylvania Supreme Court later ruled that the study did not meet scientific standards and could not be presented as evidence.