I thought about getting a Paperwhite after I lost my Kindle Keyboard on a plane trip, but went with a secondhand KK instead because it has the Text-To-Speech feature.
TTS lets you listen to a book without having to buy the audio editions, which aren’t always available and are usually far more expensive when they are. I’m sure it’s no coincidence that Kindles stopped having this feature just after Amazon bought Audible!
Admittedly the robot voice isn’t anything like as pleasant to listen to as a proper audiobook with a good narrator but it’s usually quite acceptable and can be applied to my personal documents as well.