Lockers are big in the Australian and African market, where people buy LCs brand new to drive in the bush for weekend or holiday fun. Very different cultures than the US.Lockers don’t seem like a very compelling feature that would push me over the edge in the decision to upgrade to a new model (to me).
They are a pretty accessible aftermarket modification. For a few thousand dollars you can install ARB or Harrop/Eaton lockers into any land cruiser 200 series (tech-ish content?).
Anecdotally, it seems as though lockers are less interesting to most new Land Cruiser buyers than they are to the people that buy them used.
I had a Tacoma TRD with a factory rear locker and think I may have used it a dozen times the entire time I owned it. There are just so few places you *need* lockers with a modern 4x4 (hard core off-roading aside).