Technology should be designed to be both user repairable and last at least 7 to 10 years for the initial user, with an additional 5 years of second hand use if refurbished.

Real example:

You were gifted a Kindle 3 Keyboard in at the beginning of 2010. You use until 2019-20, the battery is dead, technology has progressed, so you decide to upgrade. Instead of throwing out the Kindle Keyboard, you replace the battery and load it full of children's chapter books, giving it to a friend's kid, sure it's older but it's got every Goosebumps book, he'll love it.

He uses that for another 4 years, until it breaks or simply becomes too outdated to be practical. Then the device is recycled/parted for materials. This is the ideal tech lifespan for now.

(Modern) Foldable phones offer the exact opposite of this for very little gain beyond "it's smaller!". Smart phones are unironically a technological dead end, like the automobile.