2013/8/13 the <the.guard@mail.ru>
The site doesn't describe any real problems.
Well, it is a question to discuss.
I am not going to begin a holy war, I would like just to provide a possibility to perform a harmless /usr merge for those who share FreeDesktop's opinion.

Also I don't see how the current dir tree is not compatible
with gnu autoconf/automake. 
In a simple way: please look at coreutils-8.20.ebuild that has to move a lot of binaries from /usr/bin to /bin:

                cd "${D}"/usr/bin
                dodir /bin
                # move critical binaries into /bin (required by FHS)
                local fhs="cat chgrp chmod chown cp date dd df echo false ln ls
                           mkdir mknod mv pwd rm rmdir stty sync true uname"
                mv ${fhs} ../../bin/ || die "could not move fhs bins"

2013/8/13 pk <peterk2@coolmail.se>
So, how would this work for me who have /usr on a separate harddrive?
If you have an initrd, it will work.
Anyway, I just look for people that are interested in /usr merge.

And what would be the benefit? To me, mentioning Fedora, makes the alarm
bells go off...
Yes. it does. Fedora is a big distro sponsored by Red Hat and its /usr merge will be in RHEL-7. That's not a great idea to fight against upstream if it will do /usr merge. Remember, /bin/mail now is moved to /usr/bin/mail - what will be the next?

Sincerely,
Alessio Ababilov
Senior Software Engineer
Grid Dynamics