QNX runs in 275 million cars, and almost nobody who drives one has heard of it. Alex and Brian get into what it actually took to move Speedify onto a real-time operating system: why “real time” means guaranteed rather than fast, what happens when your process has to yield to the one controlling the brakes, and why porting from Linux meant rewriting the networking layer rather than changing a build target. Also: QNX borrowed its networking from FreeBSD, you can run the whole thing on a Raspberry Pi 4 or 5 before it goes anywhere near a vehicle, and the command for listing processes is hogs, not ps.
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