In this article Jonh Dvorak calls Itanium "one of the great fiascos of the last 50 years". While he describes the over-optimistic market expectations and the dramatic financial outcome of the idea, he doesn't go into the technical details of this epic fail. I had my chance to work with Itanium for some period of time and I personally loved its architecture, it was so clear and simple and straightforward in comparison to the modern x86 processors architecture...

So then what are/were the technical reasons of its failure? Under-performance? Incompatibility with x86 code? Complexity of compilers? Why did this "Itanic" sink?

Itanium processor block

hardware itanium
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