With ICAO keeping retirement at 65, I really don’t see the US changing our retirement age any time soon. There aren’t any contractual requirements for airlines to build carve out lines with domestic only for pilots who are over 65, nor to force older pilots into lower paying positions. If their seniority can hold the seat, they are awarded the seat and will have to be pay protected and bought off of their trips. The CEO’s of the various airlines will testify before Congress that having to keep pilots on the books who can’t fly international would add significant cost to the company, which they would immediately pass on to the consumer in the form of higher ticket prices. The politicians want zero cost political points, not to be blamed for raising the cost of travel. Unless ICAO changes, there’s really nothing to worry about in the US. When they change, we’ll almost certainly follow.