Yeah, that was my first though as well. But, I took his response as
being relevant to services that have a realtime data acquisition
element to them. Perhaps a service that is collecting data from a
hardware device of some kind.
Depends on the purpose of the data collection. I can totally see how
we'd need realtime for things like antilock brakes or nuclear pile
dampeners, but I wouldn't dare to use Windows or Unix for either of
those applications, because the critical task shouldn't ever be
preempted; I'd design a specific and explicit program and implement it
in hardware and firmware, using non preemptive multitasking, if I used
multitasking at all.