You missed a few important chips

You missed the Zilog Z-80 chip, which was also designed by Federico Faggin when he left Intel. This chip was not just a "clone" but an improvement over the Intel 8080, since it had basic memory management, used only one voltage instead of the 8080's three voltages, ran faster (up to 4 MHz), has 16-bit and 32-bit versions, and eventually killed the Intel 8080 market, since it ran CP/M better. Until the IBM PC arrived, almost every personal computer (most were Radio Shack's TRS-80 line), used the Z-80.

Intel was losing that market, even with the 8086 which was NOT the first 16-bit CPU. That honor went to National Semiconductor's PACE-16 chip, another chip you missed. And in 1980, Intel was trying to get hardware developers to use their 8086 chips, even giving them away (I asked and got one).

Another very important chip you missed was the Motorola 6800 8-bit line, which is almost as vast as the x86 is. From the 6800 came another "improvemen" which was the MOS Technology's 6802, that ran with Apples, Commodore Pets, Atari 500 and Amiga, and other that I cannot recall. Then the 6800 grew to becore the 16-bit 68000 for the MacIntosh and others, and has matured to the PowerPC which runs on the top supercomputers of the world, in every XBOX 360, and is part of the Core processor design in every Nintendo Wii and Sony Playstation.

Although Apple migrated to the Intel processors, it cannot deny that it had the MOS Tech 6502, the Motorola 68000, and the PowerPC as chips for its best lines of hardware.

The Itanium was a revival of its failed IA-32 line of chips, until HP cooperated to replace its PA-RISC chips. It is a good 64-bit competitor even against the Xeon, because it has a RISC base. And SUN keeps up with its Fujitsu-designed SPARC, now having eight cores per chip.

So, even if the Intel x86 is the most sold chip, it was never alone in its history.

History depends on who is writing it. You wrote an incomplete history.

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