Before anyone gets their back up against a wall, I am not knocking new trains or old trains. I am not promoting either one over the other. I'm just making a kind of tongue in cheek observation and maybe bringing a bit of humor to the topic, after having browsed the list of topics and seeing another quality control topic. So have fun with your trains, whatever their age.
I keep seeing posts complaining about quality control from the various manufacturers. It is a shame to buy a locomotive that can cost upwards of a thousand dollars or more and not have it work properly.
With post-war trains, you don't have this problem. There is no one to complain to. By this time, if they don't work, they are not worth buying unless you like to restore things. They have been "tested" over and over, many times. They've been abused, mishandled, left in boxes forever, wrapped in newspaper.....oh my, used in crash tests. The list is endless. But they are still running.