Cross breeding is still an effective, cheap way to "customize" your end plant.
Shorter, taller, autoflower, yields, vegetation time, flower time, overall production, etc are all things one could customize with their plants. Its very simple, and is do-able by your average farmer.
Granted, lots of times, it takes like an f2, f3, maybe even f4 to get it perfected...as well as much more crossing after that for a PERFECT plant, but still.
