alt Hacker NewsAs someone who knows only that QNX is a RTOS and that "real time" is good in some vague hand-wavy way, I found this 2015 comment a very succinct, concrete and illuminating description of one aspect of QNX's architecture that makes it properly real-time.
So thank you very much for the link.
"Real time" is only good if you need guaranteed responsiveness within certain time limits. It can actually be suboptimal and slow you down if you don't need it and want to optimize other things like throughput.