Originally Posted by kunsunoke

Not sure if you're being facetious or not. The following is the opinion of an Gen-X engineer, not intended to offend, to be taken or left as necessary.

Straight blade forks blew up during the mountain bike era. From about 1987 to about 1994, the mountain bike industry (which cared little for tradition) dominated design trends, and some of that domination bled over into road bikes. Colnago was not immune, and neither were other road bike manufacturers who were trying to re-invigorate the waning interest in their products.

In spite of the MTB hype of the era, I'm not sure straight vs. curved design made that big of a difference. Metallurgy and tube diameter/thickness were likely the big determinants in terms of ride quality in road bikes - until carbon fiber forks hit the market.