Cherokee_Cruiser
Bronteroc
So in your eyes a wide body exceeding 250KIAS below ten is safe and clear of collision hazards because they’re 121 and minimum clean speed dictates such but anyone non-121 operating at similar speeds in the same conditions is not cool.
You’re worried about closure rate and collision hazard, but the same risk exists whether or not you’re 121.
Alright, I'll say it. Yeah, it's not cool. 121 training and regulations are amongst the highest/strictest. The corporate and GA, it depends who they use for training and what standards they have. There have been cases where a corporate jet accident happened and the guy wasn't even certified/typed for that plane. Accidents speak for themselves. And in that industry, merit and who you know can go a lot further than seniority when you are only talking about operators where it's literally 1 or 2 planes and a handful of pilots. Good luck, you better be liked and fit "their mold" or you'll be outcast and go find another job. I've heard the horror stories. Besides, risk analysis. Widebody airliners for the most part aren't going into smaller mom and pop airport FBO type places where many more corpies and GA are. They're mostly (though not always) operating in the US in class B airspace. Very rarely are they in positions where they are departing uncontrolled airfields (though there are some with, military/charter operations, etc).
With technological advances, ADS-B out requirement in controlled airspace, etc, hopefully the risks of midair collisions are further reduced.