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I noted that comment too: AA and CP are still "partners". It means that we still get Admiral lounge access when travelling within the US.

That hasn't been confirmed in print yet, but I would hope the reciprocal lounge privileges remain. Afterall, even with AA's upgrading of some of their Canadian AAdvantage members to higher elite tiers, lounge access in the US does not come with PLATINUM or EXEC PLATINUM, and requires membership payment each year. (Still will have access to other oneworld partner lounges though.)