The main lure of Kindle or any other e-link device is its screen. E-Link, unlike your standard LED/OLED screens on your phone/computer/tablets has lightbulbs pointed DOWN, there’s a mirror that reflects the lgiht back up, because of this, the light that hits your eyes are much weaker and thus cause less strains (I would imagine Paperwhite and Voyage are worse with eye strains than Keyboard as Keyboard does not have lights). (This actually applies to the LED Kindles, such as Paperwhite and on, rather than the general e-link display)

I have Kindle KB, Kindle Paperwhite and the Kindle Voyage, aside from KB where the battery is dead, both Paperwhite and Voyage are still in service and it is my best purchase to date.

That said, there are still times when I miss the weight of physical book on my hand, so I still borrow physical books from libraries and purchase physical books. Through the years I saw many arguments that tends to pose this “problem” as “either/or” situations, as if having one format is a distain for the other. That is simply not true, I devour ebooks, breathe physical books and seek articles on my computer.

As to why have a dedicated device for one purpose? Because it is the best at what it does. Phone/tablet computers possess too much distractions, even unprovoked I’m bombarded with notification popups. Kindle, just read. No distractions.