I endorse the other comments.
AA has lost considerable market share here over the last 15 years as flights have been dropped, but AA still provides a reasonable degree of service. There remains a significant base of AAdvantage elites, many of whom earned lifetime qualifications 1987-2002.
The big winners of market share here in the last decade have been DL and WN. Depending on your travel patterns, you may find it necessary or more convenient to fly them from time to time. Amtrak also operates to/from the Northeast Corridor.