A fun idea but I think someone that learns the language and invests enough time into it would find no reason to have the "f" removed from sufficient, they just accept it as it is and never think twice about it
Yea, having it and using it at max just as I go to bed just makes me feel much better for the air I'll be breathing while sleeping. I also used to always fall asleep to some noise or music, so this is such a nice replacement