Of course it's just a snap shot in time and is always fluid month to month so take it for what it's worth. For Oct 2021 bidding, EWR 737 FO junior guaranteed line holder was hired in the last year and EWR 75/76 FO junior guaranteed line holder was hired roughly 4 years ago.

Just for reference.... the most junior EWR 737 CA in this last vacancy bid was hired roughly four years ago. The most junior EWR 737 guaranteed line holder for Oct 2021 bidding was a pre-merger hire. Whoever is at the bottom of the narrowbody CA lists will be sitting reserve for years.