If I get to the point of having absolutely no idea what performers are trying to communicate, and they give me no 'handle' on what I'm listening to (even if it's just 'groove', or a hint of harmony, or something, anything which relates to something that has a little relevance to recognisable sound worlds), I'm afraid my patience runs thin. It ends up being like listening to someone speaking in a completely foreign language with no reference points to help me get the first idea what is being said.