If you have certificates expiring 2/28/26, expect them to work more or less as they always have (with the addition of SEA-ICN and SEA-NRT?) and prioritize accordingly. If they're good until 2/28/27, harder to say. I think the best reading of what AS/HA has said is that they'll continue more or less as-is at least until some undetermined point next year when some undetermined set of new international upgrade options rolls out, but I haven't looked very closely for details.