There continues to be much older equipment in service, but it is in the minority, i'd say there is an overlap of cars needed vs cars in service by about 70 or so, or about 10 7 car trains. Most of those are 3 door older models, but there are the 2 door cars left, probably the ones in the best shape, or just happen to be not accessible as easily due to them being in a train not due for the yard in harrison to remove. I would estimate that by march the 2 door cars will be gone, aside maybe a few for preservation.
No I'm not a railroad professional, but that doesn't mean I can't provide first hand observational comments.