This isn't surprising, of course. Samsung doesn't make any money from making your two-year-old phone better. Samsung makes its money when you buy a new Samsung phone. Improving the old phones with software updates would cost money, and that tends to limit sales of new phones. For Samsung, it's lose-lose.
Our fridges, cars, and TVs are not even on a two-year replacement cycle. Even if you do replace your TV after it's a couple years old, you probably won't throw the old one away. It will just migrate from the living room to the master bedroom, and then from the master bedroom to the kids' room. Likewise, it's rare that a three-year-old car is simply consigned to the scrap heap. It's given away or sold off for a second, third, or fourth "life" as someone else's primary vehicle. Your fridge and washing machine will probably be kept until they blow up or you move houses.
I do not want my fridge to be smart. It can shut the hell up and keep the food I stick in it cold. Anything else, and that appliance is overstepping its boundaries. Don't tell me when I am low on milk. I'll tell you when I am low on milk. Don't tell me when my yogurt expired. I don't give a shit, and I don't want to hear it. The last thing that I want is my fridge talking to anyone else, least of all the manufacturer.