I think anyone who willingly sets up a Dual-boot or Multi-boot needs to have it explained that no matter how many OS's they set up they have what I call "false redundancy", because the reality is that you have ONE BOOTLDR.
And it isn't necissarily the one for the first OS installed.
and should that one BOOTLDR become corrupted or the physical drive it's on should fail you lose ALL of the operating systems.
Windows8 puts it's own unique turd in the punchbowl... it's BOOTLDR wipes the previous one, so once you have windows8 you cannot remove it.
and if you manage to create a dual-boot with Win8 you have created a ticking self destruct, because when Win8 shuts down permanently 90days after official release
ALL your OS installations stop working.
Does anyone actually READ the instructions from M$ on the Win8 Consumer preview download page?
I get the distinct impression that only about 1-of-20 do and about half of those actually understand what M$ says.