It is a factor for everybody. It all comes down to what kind of fences are put in after SLI. If there are no fences, I would assume there will be a flood of people interested in coming to the jets. They won't be able to push anyone out of a seat, but they could bid over to the jet side during a vacancy. This would mean that a person who was junior on the jet before, would be staying junior on the jet for a very long time to come as vacancies to the better paying positions would go pretty senior.

Again, EVERYBODY is affected by SLI. The fact that someones spot on the overall list doesn't change, doesn't necessarily mean their outlook for QOL isn't affected.