I fear, the Itanium strengthened the believe at Intel, that x86 is the one and only architecture. The downfall of the Itanium had several reasons. They went be

I fear, the Itanium strengthened the believe at Intel, that x86 is the one and only architecture. The downfall of the Itanium had several reasons. They went beyond RISC with EPIC, a technology which had great theoretical promises, but had not been shown to yield those results in practise. Also, the project suffered from bad management and delays. Finally AMD pushed x86 just far enough forward to be a viable alternative. In the beginning, the Itanium was an expensive, power-hungry monster, but it did perform quite well for heavy computations. It could have had a much better future, if Intel had not abandoned it - the software situation could have been much better, if for example Linux boards had been made available to all interested. The latest version only made it to a 32nm process, the transistor count being smaller than in a modern iPhone. So just redoing the same design in a cutting-edge process would make for a very interesting processor.