It's all over the history. For instance: "As part of the roadmap to phase out Alpha-, MIPS- and PA-RISC-based systems in favor of Itanium-based systems at HP,

It's all over the history. For instance: "As part of the roadmap to phase out Alpha-, MIPS- and PA-RISC-based systems in favor of Itanium-based systems at HP, the most recent AlphaServer systems reached their end of general availability on 27 April 2007." "Seen by both executives at HP and Compaq as a redundant overlapping product under the new merged company and with Intel's IA-64 efforts underway, the Alpha -- arguably a much more mature, better supported and more desirable platform was phased out." From Wikipedia: "On June 25, 2001, Compaq announced that Alpha would be phased out by 2004 in favor of Intel's Itanium, canceled the planned EV8 chip, and sold all Alpha intellectual property to Intel.[6] Hewlett-Packard merged with Compaq in 2002; HP announced that development of the Alpha series would continue for a few more years, including the release of a 1.3 GHz EV7 variant named the EV7z. This would be the final iteration of Alpha, the 0.13 µm EV79 also being canceled." All of this in spite of having a large number of supercomputers in the Top500 list, lots of actively developed scientific computing software optimized for Alpha, and features that other CPUs wouldn't have for years.