Thx alex and Wonderfall for pointing out a lot of the benefits of ChromeOS. Yes, security and third-party privacy is without a doubt great. I am also interested into getting more info about first-party privacy (Google and Chromebook vendor).
Since it has been a trend for quite some time to provide customers with toggles to seemingly provide privacy, while still collecting vast amounts of data, I am still a bit cautious regarding the effectiveness of these privacy settings, and whether this really turns off telemetry and data collection completely.
Just to give you an example, why I don't trust a few UI toggles: Microsoft makes it pretty cumbersome to turn off all telemetry on Windows. If you click through all UI privacy toggles and you think that you did everything important, Microsoft will still collect huge amounts of telemetry. I am a Windows user myself and not a Microsoft or big tech hater, but seriously Microsoft? So you are smart and go a step further and set telemetry level to 0 (on Enterprise edition). But even then there is still telemetry as this blog shows with a MITM attack : https://www.softscheck.com/en/privacy-analysis-windows-10-enterprise-telemetry-level-0/
That's just one of many examples, where companies talk you into believing privacy by introducing a few privacy toggles. And if companies make even more money with your data than Microsoft, like Google does, then I am even more cautious.
So if someone with a Chromebook had the knowledge and time to do a MITM attack to look into telemetry, that would be absolutely awesome. Hopefully ChromeOS doesn't have certificate pinning. Maybe the PrivacyGuides contributers also have an interest in doing something like this (@TommyTran732)?