Chromebooks are sufficiently robust, reliable, and flexible at a good price
Caution: Chromebooks
Gary S. Stager, Ph.D.

I would say that is exactly what they are. For every example you wish to share of an underutilised Chromebook there is an iPad, Windows Laptop and ICT Suite example to match and most probably many more. Any focus on an individual device/computer is wasted. All tools for learning rely on teachers who understand learning picking tools to support it. The Chromebook can do this if planned for and understood.