I think you missed the point of that comment completely.
Which market segment does linux not totally dominate nowadays? Phones, big servers, embedded devices, HPC... Maybe you could argue desktops? Maybe? Still a very signficant player there however you dice it.
Going back to Linus' original email announcement then apply your framework and you don't predict linux competing anywhere let alone dominating everywhere. How could anyone? Smash Sun, IBM, HP all of them. No chance. None.
The future, it's really hard to predict except in hindsight.
The fact that Linux dominates does not entail that other architectural approaches may be more suitable for the task. Variety is the spice of life and the “Linux monoculture” might not be such a great thing. BeOS/Haiku, Plan9/Inferno, OS400, and Fuchisa are all fascinating lineages that excel in their chosen domains.
Which market segment does linux not totally dominate nowadays? Phones, big servers, embedded devices, HPC... Maybe you could argue desktops? Maybe? Still a very signficant player there however you dice it.
Going back to Linus' original email announcement then apply your framework and you don't predict linux competing anywhere let alone dominating everywhere. How could anyone? Smash Sun, IBM, HP all of them. No chance. None.
The future, it's really hard to predict except in hindsight.