Really? You don't mind Google's extensive datamining and lockdown of the OS?
I would never ever consider using that. I'm surprised also, in our company nobody uses chromeos. But we have thousands of linux laptops and hundreds of Macs.
I've considered a Chromebook at work where the real coding and builds are being done over SSH on a headless Linux machine anyway, but the fuss involved for just a basic shell and SSH were enough to turn me away. So I can't imagine using one for local development too, data mining aside. I know some people use it and it works with the right workarounds, but why bother.
Also idk why there's nothing as good as the Mac iTerm2 for Linux.
Um, you literally go to Settings -> About ChromeOS -> Developers, enable "Linux development environment" and after 5 minutes have access to fully featured Debian Linux.
The standalone (non-linux) ssh client is indeed not the best, it's okay.