Say you have brand new Ubuntu server with a few Samba shares (and Avahi for auto-discovery). Or perhaps you have upgraded your existing server to 17.10 or 18.04 LTS.
You open up Nautilus or Finder (or if you are unlucky, File Explorer) to test your Samba shares, and what do you see? Your meticulously chosen server name is in now in ALL CAPS. (Note that I haven’t confirmed this in File Explorer.)
This aggression will not stand (man).