The beauty of a Kindle has always been its simplicity.You can’t use it to scroll through social media, receive notifications, or multitask. The e-reader’s sole purpose is to display text and provide a distraction-free experience.Because Kindles are durable devices that can’t do much, they tend to last a long time. Many people have used the same model for years — and some Wirecutter staffers have used their Kindles for more than a decade. But some Kindle owners may end up having to upgrade to a newer version — or ditch their Kindles altogether.Earlier this week, Amazon notified its customers via email that, starting May 20, it will end support for Kindle and Kindle Fire devices released in 2012 or earlier. That means you’ll no longer be able to download new content to your e-reader via Amazon’s Kindle store.Although you don’t have to stop using your old Kindle immediately, the restricted functionality may force you to consider whether you want to upgrade to a newer version or ditch the Amazon ecosystem altogether.If you own a Kindle that’s no longer supported, Amazon wants you to buy a new one. The company is offering a 20% discount that you can apply toward one of its new Kindle models, along with a $20 e-book credit that will automatically be applied to your account with the purchase of a new device. The promotion will be valid through June 20, exactly a month after the company ends support for its older models.Here’s what you need to know about Amazon’s decision to sunset its older e-readers and tablets, and what that means for you.