Hi Jonathan. Yes. The Reduced Instruction Set idea was (is) a brilliant idea (indeed, I would say, a stroke of genius)! Someone at Acorn must have had a truly Eureka! moment (...hence the choice of name for the successor to the BBC series, I reckon).
Actually, RISC is something I know very little about ... and I look forward to finding out more about it.
So, who carries the RISC/ARM torch these days, do you reckon? After all, it can't be Acorn (regrettably). Yet another example of British innovation being capitalized upon by others?