It did caught, as a research system: it is/was a fertile ground, from which many ideas made their ways to mainstream systems. There's so much inertia outside of

It did caught, as a research system: it is/was a fertile ground, from which many ideas made their ways to mainstream systems. There's so much inertia outside of the Plan9 realm that it essentially prevents any potential challengers: the threshold is high. I do think Plan9 did succeed to the best of its abilities, given the context.