Slow news day so here's another piece with historical trivia. ExtremeTech took a look at the worst processors ever made, you can read their take over here. This includes the Intel Itanium, the AMD Bulldozer, The Pentium 4 "Prescott", the Cyrix 6x86, the Pentium III 1.13GHz, and various others.
Intel's Itanium was a radical attempt to push hardware complexity into software optimizations. All of the work to determine which instructions to execute in parallel was handled by the compiler before the CPU ran a byte of code. Analysts predicted Itanium would conquer the world. It didn't. Compilers were unable to extract necessary performance and the chip was radically incompatible with everything that had come before it. Once expected to replace x86 entirely and change the world, Itanium limped along for years with a niche market and precious little else.