Yeah but chromebook data is not stored on the hard drive but on cloud and I would have thought a personal cloud account which is not free, would be secure from Google snooping.Some of my grad students liked Chrome, including students who were sophisticated about software security.
However, I have concerns about Google's and Facebook's use of customer / user / third-party-but-surveilled-anyway data and their history with courts and the regulatory agencies gives me little confidence that they will respect my privacy in the future. To my eyes, using a Google computer gives Google too much access to my financial records and investing strategies and too little insight into how they will use that information. So I don't use their computers, tablets or phones.
Again, my opinion is based on factors other than performance or reliability. Your priorities and mine might differ.
https://cloud.google.com/blog/topics/developers-practitioners/data-security-google-cloud