Earlier quoted context omitted.
It does, if the stars align. The default setup of these computers (no full-disk encryption, easy to disable secure boot) typically means that it offers no such security. Look at Chromebook for an example of apparently doing it right.
The Chromebook is doing it right? Really? It wipes your hard disk if you enable developer mode(which is a painful process in itself). And then at every single boot you either have to wait thirty seconds to go past a very scary warning or press Ctrl-D. Every single time you boot. If you switch back to ChromeOS, the hard disk is wiped again. I would love to see HN commenters' reactions if on disabling Secure Boot, the…
The equivalent to a Windows 8 partition on ChromeOS is cloud storage like Google Drive, Dropbox or Skydrive. This cloud storage is not being wiped when you switch to or from developer mode.
The local storage is just a temporary storage for downloads and caching.
Oh, and entering developer mode on my Pixel was as easy as holding 3 keys down at the same time.