Spoken by a Colgan pilot who has already experienced a "longevity" transition. I'm sure you'd be singing a different tune if the shoe were on the other foot. That transition would demolish career expectations and upgrades for established fo's like it already did at 9e. That would never work. I highly doubt 6 year fo's at other carriers would be OK with someone jumping them on the senority list. The only way longevity transfer would work is strictly pay rates, not seniority, and we all know mgmt teams wouldn't buy into that either.