I have adopted Chrome OS as my primary OS. I started doing so with a Chromebook Pixel in 2013, which I used when writing the first version of
https://CoCalc.com. I ended up switching to running full Linux on it, since Chrome OS was too limiting then. After a year I switched to using various Mac laptops. However, ALL of my Mac laptops broke due to keyboard failures, and modern mac keyboards have a feel that sucks for me personally. I switched to an iPad pro 10.5" for a few months, as an experiment in pain (but also freedom, since it is so small and light). Over a year ago, I bought a Google Pixelbook, and switch to it as my primary OS. Since I'm the lead developer of
https://cocalc.com, what I do under Chrome OS is web development (literally, of cocalc.com, which is all done within cocalc.com), data science (which is what cocalc.com is for), and email (via gmail). I use crouton so I can easily get a local root shell and use encrypted USB drives (for offsite backups), and I Crostini so I can run Docker containers, e.g., so I can do offline work with the CoCalc codebase and use local X11 applications like Inkscape.
The biggest surprise for me was that I bought a $450 14" HP x360 chromebook for a booth at a tradeshow, and I've been using that chromebook as my main laptop for the last few months, instead of my 16GB top-end Pixelbook. Why? The larger 16:9 screen is way better for coding (for me), and the keyboard is amazingly for me (I consider it much better than the pixelbook keyboard). This HP chromebook weighs a pound more than the pixelbook, but I'm not carrying it around that much so it doesn't matter. Also, it's nice when I do carry it around knowing that it cost $450 instead of $1599, so if it is stolen or damaged, it is much less of a loss.
Conclusion: I've been using ChromeOS as my primary OS off and on since 2013, and I'm impressed with how ChromeOS (and the Chromebook ecosystem) have improved over the years. And I'm very surprised, because today I choose a $450 Chromebook over a $2000 Apple laptop, whereas from 2007 to 20017, I would choose the Apple laptop. Also, for me, everything is a company (or university purchase), so even though "money is no object", I still prefer the relatively cheap Chromebook.
Another, thing -- my old Chromebook Pixel had LTE data, since it always had internet. My iPad pro also did. However, with modern tethering (I have a Pixel 2 XL), a phone provides perfectly good tethering --there's no need to have it built into your laptop.