Right, but from what I understand, all of the R42s and only a few dozen R32s are supposed to go. So that's somewhere around 80-90 cars that will retire once the R179s come in. That means that about 80-90 R32s could be retired, keeping the 50 R42s and the remaining ~150 R32s.
And even though the R42s look terrible (which is being taken care of with the recent SMS), they have had a higher MDBF than the R32s for some time now. The resulting lower maintenance costs for the 60' SMEE fleet would certainly offset any costs involved in keeping parts, etc. for the R42 fleet.
Or am I completely and totally mistaken, lol?