It's obvious.
The letter "i" is cute. It is harmless. It is a nice little letter you could bring home to your parents. It can stand for "Intel." Or just "I," as in: "I have a kick ass new CPU."
It's not EXTREME or ADULT-ONLY like the letter "X". Just the sheer magnitude of this letter injects fear into the hearts of conservative parents everywhere. Hell, even X-Rays are quite dangerous if we don't use them in moderation.
It's not "e" which quite frankly, is so 5 years ago. And, you wouldn't want to be confused with eMachines.
It's not "A" through "F", which either sounds like something childlike (ABC's) or a letter grade in school.
"G" or "H" sounds far too apologetic.
"J" through "N" are far too unmemorable letters. They are from the dead center of the alphabet, which is a marketing no-man's land!
"O" looks like zero, and causes far too much confusion.
"P" ... well we've been there already haven't we?
"Q" ... far too obscure.
"R" "S" "T" - far too common
"U" - Again, far too obscure.
"V" - It's been done, and it was called: V for Vendetta.
"W" - considering there is no tungsten in the CPU, it would just be a strange letter to use.
"Y" - As in, "why should I buy this stinking CPU"?
"Z" - BMW and Nissan have already crowded the market with the Z4 roadster/coupe and 350/370Z. No more room for CPU's.
:laugh: