Amex sent me an offer to upgrade from PRG to Platinum. I know I can justify the fee because all of my spending goes on my PRG and I just relocated so I'll be flying quite often. Marriott and Platinum Select are my only two other cards with AFs, would Platinum make these obsolete? I'm thinking Platinum Select for sure because I moved from a city that's an AA hub, and even if I flew AA I could use the incidental credit for my checked bags. Marriott I think would still be worth the free night. So should I get rid of the Platinum Select? What could I change it to?
Are you elite on another airline? Using the Platinum incidentals credit for bag fees on an airline (AA) you generally won't be using in the future seems likely to lead to wasting some of it. Maybe use it for fees you can't get waived on an airline you fly more often?
I wouldn't say Platinum makes the AA card obsolete...it's your relocation and loyalty shift that may have that effect.
Keep in mind Platinum now offers Marriott Gold, so if the Marriott annual night is worth the AF to you, it could be well worth keeping.