I’m a fan of the old MF67 and MP73 legacy stock on the Paris Metro, the ones with the ‘latch’ to open the doors. Based on a recent visit the MP73 seem to be gradually being replaced on Line 6, but how long do the MF67s on lines 10, 12, 3 and 3bis have? Has anything been said about expected replacement timeframes and/or which line will keep them the longest?