So an inadvertent wipe is really just an inconvenience of 30-60 minutes, and if it's a border patrol or TSA agent you can then have fun acting all indignant at how they broke your device and you lost so much work and your boss is gonna kill you and you want to talk to their supervisor right now.
The lack of hardware security is a consideration, but frankly if your device is handled by a malicious actor outside of your control, you're kinda screwed anyways.
This protection is not just against "evil maids" but any attack that modified the disk in the past. E.g., if the system is compromisd due to a software fault, nothing can persist on disk undetected (like ZFS/bcachefs/BtrFS checksummi preventa bit-rot from being undetected)
In doesn't show up in Chrome Extensions search as easily as I would hope.
Yes, they work.
No, they don't capture shortcuts like 'ctrl+W' which are handled by ChromeOS.
Installing a chroot isn't that difficult, in fact it was actually kind of fun and started me on an incredible tech exploration journey that currently has me learning software development using Vim on a command line only linux distribution. I never would have imagined such a thing a year ago. It is weird thinking having a $140 refurbished acer c720 may have led me on a completely different, exciting life path.
I mentioned above that I think Caret is a great Sublime clone, but I also like having the real SublimeText, with its awesome add-on packages, Git integration, etc. The article's recommendation that you must stick with Android-enabled Chromebooks limits your options, and the only reason the recommendation exists is that he needs some way of getting access to the developer tools--gcc, etc. A crouton chroot gets you there the same way, and I'd argue it's better since the programs are running natively rather than through an emulated Android layer.
Maybe a separate Linux install such as GalliumOS can really be called full access Linux environment?
Been a few years since I used a chromebook w/crouton, but that wasn't my recollection. In fact I recall a fork of crouton that supported Fedora explicitly stating that it installs via docker.
Additionally, once Developer Mode is enabled, you must hit Ctrl+D to move past the warning screen every time. It is incredibly easy to inadvertently hit Enter or Spacebar, and then have the Chromebook wipe itself and restore to factory settings. I've done it inadvertently myself, and have heard multiple reports of a developer's spouse/child accidentally clicking it, too. Unless a Border Patrol agent knew exactly what they were doing, I'd be willing to bet they'd accidentally wipe it as well.
Finally, while I'm aware that disabling Secure Boot in theory opens you up to an Evil Maid attack, what is the likelihood that border patrol/customs would have a malicious OS on hand, and the know-how to flash it? Worst -case scenario, if you suspect they've tampered with the OS, simply hit Spacebar yourself as soon as you get it back, restore Secure Boot, and then start over from scratch!
As an aside, if you are confined to ChromeOS, I highly recommend Caret as an editor. It's a FOSS, Sublime clone chrome app that works swimmingly on Chromebooks.