In regards to incandescent bulbs, I do not agree it's a planned obsolescence just by itself. You have to trade off between lifetime and brightness, light whiteness and efficiency. As you decrease filament temperature to increase it's lifetime, bulb becomes less efficient as it's spectrum shifts more towards IR, thus more energy is spent on heating ambient rather than usable light. And light no longer will be "white" and will have a strong yellow/red tint. As a confirmation of that, I can assure you that bulbs produced in Soviet union did not last a tad longer. And their planned economy did not bother with planned obsolescence to ensure future sales. If anything, they would be more happy to spend less resources on producing consumer goods, and more on military. If something did not last, it was simply because it was crap due to negligence, low quality materials or similar reasons, not because it was intentionally designed to not last.
Longevity of incandescent bulb can be easily increased a lot at virtually no cost, however you will not like how it works.