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>Time for the DoD to commission their own OS.

I am shocked that governments are not investing mega-bucks into getting a microkernel OS built that could be run on internet routers, tanks, power plants, aircraft, water treatment facilities etc. Even if microkerenel design has some impossible to overcome performance limitations, for utmost security, it would be a small price to pay knowing that hacking the OS was nearly impossible.

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Your shock assumes there is leadership at the top that sees the big picture with respect to enabling technology. While not in the US, I have seen the inner workings of other nations armed forces, and there is an overwhelming urge to farm everything out to contractors - so there are going to be at least two competing microkernel designs (proprietary of course) for each the army, navy and air forces under the current leadership structures.

> Even if microkerenel design has some impossible to overcome performance limitations

It doesn't. There's no inherent hit on microkernel performance. What exists are limitations of hardware that wasn't designed for it, and a complete lack of interest on creating hardware optimized for them.

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