I am / was using a Chromebook, and I got it for several reasons:
- I needed a secondary "couch" device (laptop/tablet), with Linux support
- back when I got it (almost five years ago), there was no other light, small (11.3") notebook, with six-plus hours battery, for under $200. Upgraded RAM, SSD, total price $300. Dual-booted between ChromeOS and Ubuntu for next four years, with Windows 10 running inside Ubuntu' VM for when needed.
- Used it whenever I needed to browse the web, read my email, etc. Used to develop applications while on the road (not the best one, but still did the job)
- Still using it (converted to Linux-only) when battery of my tablet goes down, or on the road.
Would I get one again? I almost bought another one for a relative, but lack of native Skype client turned me off.