I'm thoroughly convinced that the guy who changed lanes into me last week did not see me before, during, or after the incident.

Drivers are already fighting the "multi-tasking fiasco" when they're driving "by the book". They should be using two or preferably three of their senses at once (sight, sound, touch) as well as steering, modulating the throttle or brake all at the same time. Each single additional task increases the brain's workload one more order of magnitude. If it's gorging on their McWhatever, chugging their coffee or smoothie, doing makeup, yakking on the phone, or just changing radio stations without even looking at the radio, it's still SOMETHING ELSE that's diluting their attention.

Thank goodness you're okay.