My guess is that 2 factors - the extra cost of providing a good trigger and the high percentage of rifles that are used by kids - outweighs the consideration of making good triggers standard on rimfires.
It IS good to see the blade style triggers becoming more common on rimfires, and since Savage, Ruger, Marlin are doing it I'm hoping that other makers will feel pressured to compete. I would at least like to see "adult" triggers on adult sized guns.
