My wife uses her everyday as well. She basically wanted tablet functionality and a keyboard. She doesn't need a DVD-ROM drive, Core i5/7, etc. She uses it for her everyday web-browsing...looking up recipes, doing school work, or sharing stuff with our daughter. That's it. Any other features on a laptop would be wasted.
Plus, as a teacher all of the grading and performance applications are web-based so she can input her grades, create lesson plans, and do all of her performance evaluations on the Chromebook as well. This would have been too tedious without a keyboard (as compared to getting her a tablet and then having to buy a separate keyboard), so the relatively inexpensive Chromebook was the ideal solution for her.
She doesn't need to worry about installing updates or applications and she can easily store all of her data in her Google Drive so she can access it anywhere.. on her Chromebook, phone, desktop PC, or at school.