Understanding the bin, sbin, usr/bin, usr/sbin split (2010)
I once sent out a proposal on the FreeBSD lists to merge /sbin with /bin, and /usr/sbin with /usr/bin. People were concerned that this would slow down the system, due to PATH lookups taking longer. Even when I demonstrated the opposite was true (it being faster due to fewer directories needing to be scanned), I wasn't able to get consensus. What a shame.