Not everything went to the Americans and we have received technologically from them in some areas. Also, the Beeb was sold there AIUI but possiby wasn't pushed hard enough.
Acorn tried to repeat many of the strengths of the BBC with the RiscPC and its incredible expandibility which is attested to by so many still being in use and still being bought second hand.
What I'm talking about is trying to think in terms of the assets we still have rather than wallow in perceived failure and take it from there. That's what the best Acorn/RISC OS projects have done and are still in fact doing.