All of these things were either rejected by the market or didn't even make it to the market.
Binary compatibility is one of the major if not the major reason that x86 has hung around so long. In the 1980's and 90's x86 was slower than the RISC workstation competitors but Intel and AMD really took the performance crown around 2000.
https://en.wikipedia.org/wiki/Intel_i860
Or the Intel Itanium?
https://en.wikipedia.org/wiki/Itanium
Or the AMD Am29000?
https://en.wikipedia.org/wiki/AMD_Am29000
Or the AMD K12 which was a 64-bit ARM?
https://www.anandtech.com/show/7990/amd-announces-k12-core-c...
All of these things were either rejected by the market or didn't even make it to the market.
Binary compatibility is one of the major if not the major reason that x86 has hung around so long. In the 1980's and 90's x86 was slower than the RISC workstation competitors but Intel and AMD really took the performance crown around 2000.