Not only that but ultimately all those senior guys will go to the jet - and then just sit there - not only capping the seniority of the junior captains but slowing advancement for everyone. Ultimately, every Q400 retired will free up 4-5 captains, most far senior to existing jet captains. But with the only vacancies then coming from the smaller number of less senior captains moving on, it's like taking three-quarters of the captain slots out of play for FOs wanting to upgrade.