Anotherbusdriver is 100% spot on.
For Airbus and 747 crews,seniority based type transfer is the number one issue, above all of the other multiple issues that we face, in order to see some light at the end of a long,dark tunnel.
For 777 crews, it is at the bottom of the list.
So...quite a discrepancy. It is just a matter of time before non-777 crews start making their own deals simply to survive, contract compliance or not.