Maybe I'm late to the party, apologies if this is known already. I just had two good segments in C+ on two different 738s - except I didn't actually select C+ seats. On both flights, C+ was rows 10-12 on the seatmap. I just booked preferred seats in Row 15. On both planes, though, C+ went back to row 15 and we had all of the usual C+ service. Thing is, I looked at the seat maps in the app just before boarding, and it didn't show this configuration so I'm doubting it was two consecutive lucky aircraft swaps. Is this just the norm or is DL refitting part of the fleet before selling it back to Row 15, just to be safe that they don't sell the product for planes where it isn't yet configured?

In any case, I was happy with it, and would pay money for it in the future.