https://en.wikipedia.org/wiki/Intel_iAPX_432

I'd never heard of it myself, and reading that Wikipedia page it seems to have been a collection of every possible technology that didn't pan out in IC-language-OS codesign.

Meanwhile, in Britain a few years later in 1985, a small company and a dedicated engineer, Sophie Wilson, decided that what they needed was a RISC processor that was as plain and straightforward as possible ...