This will simply create a lower level
of lookout. The Metro crew likely weren’t looking out as they were in CTA and assumed a lookout being not needed. What happens to the aircraft not fitted with ADSB out, they become invisible to the ADSB crowd. Pilots using tech for separation will spend time staring at their screens, EFIS flight instruments and written checklists at the expense of a proper lookout.
im not against technology, but am against technology without proper training. The HF implications around this equipment is serious stuff and is simply ignored.