> ChromeOS has better security and performance than Ubuntu [...]

I'm going to need a citation on that, especially performance. Doubly so if Crostini is put into the mix.

> [...] updates things like peripheral firmware that Ubuntu isn't even aware of.

Like what? WiFi cards, etc.? Isn't that generally in kernel already? What kind of updates do you think are not done by Ubuntu or another Linux distro?

Last I tried ChromeOS was on the Pixel Slate way back when. A buggy, unstable, clearly not properly tested, unperformed mess that I would not wish upon my enemies. Glad to see it has improved to usable now, but that it is better than any other Linux distros, I can't say how considering even being on par with e.g. Fedora would have been a miracle not to long ago.

Happy to admit that purely on the UI/UX, ChromeOS is very solid in my opinion, arguably and subjectively the most consistent and user friendly designed desktop environment I know. Far more consistent than anything MSFT or Apple have provided in quite some time, everything looks like it should, placement is easy to grasp and reliable with a clear identity. Consistency wise, only Gnome can hold a candle to the strictness with which the ChromeOS team execute their vision, though there is the clear divergence in the Gnome team pushing new UX innovations and concepts even if they are controversial and may need to time to learn, whilst the ChromeOS team seems purely focused on the most clearly easy to master approach one can take.