If you read the article though you would see this person's complaints are not with the upgrade process but with the memory usage, touch interface, and other behavior of Windows 10.
VirtualBox 5.0.0 on relatively modest hardware. I haven't tested it beyond running a couple Linux VMs though.
I had trouble with it months ago in technical previews, but I've been running it successfully for a while now.
That said, I haven't moved to the RTM version yet. Could be another new issue.
YMMV basically.
Had to reboot it.
That said, I have updated (dist-upgrade) recent (12.04+) Ubuntu installs more or less unattended with no trouble. So I think the OP was probably a troll.
My existing (home) Arch install has survived through a couple different hard drives, copied over directly from a USB stick, with various hardware changes off and on since. Prior to that, I've had Gentoo and Ubuntu installs persist across substantial hardware changes mostly unscathed (Gentoo required preparations beforehand, mostly because I was an idiot and did extensive kernel customizations I probably didn't need).
I don't understand the trolling, though. There are far too many variables that might affect one particular OS/hardware combination more than others, and that's to say nothing of PEBKAC-related issues...