[lispm]

Before Lisp Machines were killed in the market it was clear that new architectures were needed and a few were under development, even RISC like CPUs. They weren't released.

But Lisp at that time was already fast enough on standard RISC chips (MIPS, SPARC, ALPHA, POWER, ...). Later the 64bit RISC chips also provided enough memory space. SPARC also had some tricks for Lisp implementors.

Currently the assembler coded Ivory emulator is 80 times faster on Apple's M1 than the last Ivory hardware (the Ivory Microprocessor from Symbolics was released end 80s).