"skimping on proper operating system technology (along with other things) did it for the company in the end."
I don't think the OS was an issue there. If you compare to the competition at the time, RISC OS was not outdated by any measure. What killed Acorn was partly a heavy investment in net computers tat never really panned out in combination with over-priced hardware and lack of an up-to-date laptop (the only they ever made was the A4, which was long outdated by the time Acorn folded).
Other factors was the public impression that Acorn computers were only good for school use and the lack of games (compared to Windows PCs and the Amiga).
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