On a flight last week with the old configuration the attendant told me they only have 1 763 left in the old configuration. If you go on line and try and make a reservation, you will see a star next to routes with the new equipment.
Now this may surprise some, when traveling alone I like the new configuration with the sleeper podss, but when with my wife, I like to old configuration. Although not lay flat, larger wider seats and we can chat en-route. I also find the pods can be cramped