[I'm likely not the target audience.] For IoT applications I can think of, a soft real-time system using standard kernel and appropriate mainstream should be s

[I'm likely not the target audience.] For IoT applications I can think of, a soft real-time system using standard kernel and appropriate mainstream should be sufficient. I suppose real-time process control falls under IoT and could have shorter hard deadlines. But when I think of IoT I'm thinking over the internet with > 1ms communication and jitter times. Maybe the way to think of this is "Yes, we can do hard real-time things in lower-level hardware that's used in the device which includes a soft real-time OS". But another approach is to "Use this hard real-time OS to do all of it instead of having two types of firmware/software development."