Always a possibility. We had it in the 90s when the freezes were such that guppy, bus, trimotor, 757 etc and other FOs couldn't bid to the 777 if they already had a freeze. The thing now is that any 757, bus, or guppy FO can upgrade to the 777 (if their freeze is an equipment training freeze and not one of the other two), so its not super likely we will see this.

I think the lack of the old style freezes prevents this from happening, although it is nice to see guys having choice, something that hasn't existed much over the last 14 years.

I predict we don't see it, unfortunately.