IF YOU CAN UNDERSTAND THAT ALL CAPS IS SHOUTY, then it is easy to follow that all lower is a whisper, informal, casual way to talk. there are people who dislike all caps, i do too. i feel even capitalizing the first part of nouns and such grammar is shouty. yup. different people have different sensitivities for different things. i always liked all lower, also picked it from python_programming for a decade. so i am happy for this trend.