(Updated: Awesome image courtesy Jason Liebig, check it out here.He has a great vintage photo archive that you'll love.)
Yes, there are eight zillion kinds of Doritos out there, and they often use Taco in their name. We even hear Frito-Lay will be releasing a limited-edition throwback Taco flavor this month.
Whatever. It's NOT THE SAME. We've tried all their taco variations and none have ever been the same as the original version. (No, "Tacos at Midnight" is NOT the same.)
According to Wikipedia, Doritos came out in 1964, and Taco was their second flavor ever, right after Toasted Corn and EVEN BEFORE NACHO CHEESE.
People all over are still mourning the damn things, even comedian Michael Ian Black. (Oh, and me.)
I suspect Doritos HQ actually lost the original recipe -- we were kind of a disorganized country in the 1960s and 1970s -- and just can't admit it, so they keep reissuing flavors with "taco" in the name and acting like they don't know any different.