Are these 4 being (mostly) dedicated to certain routes? Or is it a crapshoot which version you’ll end up with? I am looking at a ORD-MUC flight in June and the seat map is for the old config. It’s the best timed flight, so I’ll probably book it regardless, but if there were a reasonable chance of ending up on one of the reconfigured aircraft, that would probably clinch it for me.