Someone Somewhere said:
Not so much planned obsolescence as Moore's law, amongst other things.
Simply put, newer stuff is better, because they've learned since making the old stuff. Hence why old cars aren't seen much, plus a pile of other stuff.
If I bought a i5 3570k later on Intel® Core™ i5-4570 Processor
(6M Cache, up to 3.60 GHz) arrives on the market, and I feels sometimes mad about this companies....Very irritating . Then I will wait for at least 5 years and then I will buy a smartphone perhaps nexus 31 or Lumia 9000