Bring Your Own Device (BYOD)
Chromebooks last until they reach their "Auto Update Expiration." At that point, the operating system will no longer receive updates, and it will start to develop issues. This list includes the expiration dates for all current Chromebooks. Make sure the Chromebook you buy is going to last. Sometimes they go on sale because they will expire soon. https://support.google.com/chrome/a/answer/6220366?