extlinux bootloader boot in another way? Explain please!

[nooby]

I fail to read highly abstract tech text. I found this text in a commentary here
http://mjg59.dreamwidth.org/5552.html?t ... #cmt110768

it is already possible to boot linux without messing with the MBR.
the extlinux bootloader supports being installed into the header
or a regular partition (like the linux /boot or root partition) and boot linux from there.
the foresight linux distribution uses extlinux in such a way by default.
greetings, eMBee.

http://en.wikipedia.org/wiki/SYSLINUX#EXTLINUX

EXTLINUX is typically used as a general-purpose bootloader, similar to LILO or GRUB.
Since Syslinux 4, EXTLINUX has been merged with SYSLINUX.

http://en.wikipedia.org/wiki/Foresight_Linux
http://distrowatch.com/table.php?distribution=Foresight
http://www.foresightlinux.org/

so much to read through. If this ext thing is so cool why don't we have it? Or do we and not brag about it?