You are knee deep in a cow piss on a remote farm in Nebraska, offline and some library has some version issue with your proprietary licensed language. A trivial solution if it was free language, but now it requires 300 miles trip. You are in Nagorno Karabakh and just spoke to some random stranger about this new funny speak-language but you cannot give him PDF because it's not free. These issues stings very deep because how artificial and easily solvable would they be. Some things must be free otherwise they cannot be used to their full potential. So you stand there, in Nebraska or Nagorno Karabakh and swear - Never again will I use proprietary language. I have nothing agains proprietary software or linguistic books but the language itself must be free.