I'm saying it does have a place despite the fact that it can be a bit vague and open to interpretation. Don't write off the idea altogether. Use it when its black and white, like issuing requirements, putting aircraft on headings etc. rather than relying on profile sep. Most of what we all do every day is qualifies as separation assurance anyway.
The poor enroute people have to justify 900' and 4.5nm for goodness sake
You have been gone a long time. 4.9 is a breakdown these days.
If you think there was a LOS, then all considerations of SA are irrelevant anyway.
Are we saying that what ASA calls LOSA should be a LOS, or should be a non event?