Everyone I know stayed on Airways bennies even while we were out in Hawaii. I think it depends on your presently-awarded base during the enrollment window.

All CRJ pilots on the mainland (which is to say all CRJ pilots now), can and do perform flying for both mainline partners--so all CRJ pilots get to non-rev in both systems. For example, one time as an IAD lineholding FO, I had a UAX CLT-IAD flight cancel, and crew sched reassigned my CA and I to operate a CLT-IAD flight in the Airways system. It's not just reserves--everyone can and occasionally does do flying for both partners.

I'm just saying the IAH base is the only place where no one is going to touch an Airways flight number, hence in theory no one there will have Airways benefits after this year's enrollment period ends.