Florence Hazrat in The Millions:
Noisy. Hysterical. Brash. The textual version of junk food. The selfie of grammar. The exclamation point attracts enormous (and undue) amounts of flak for its unabashed claim to presence in the name of emotion which some unkind souls interpret as egotistical attention-seeking. We’ve grown suspicious of feelings, particularly the big ones needing the eruption of a ! to relieve ourselves. This trend started sometime around 1900 when modernity began to mean functionality and clean straight lines (witness the sensible boxes of a Bauhaus building), rather than the “extra” mood of Victorian sensitivity or frilly playful Renaissance decorations.
Things need to make sense, and the ! just doesn’t, subjective and subversive as it is, popping out from the uniform flow of words on the line. Since the triumphal conquering of smartphone technology and social media, the exclamation point finds fewer and fewer friends: We live in a digital village, chatting to one another from across the globe, and will use emotive social cues such as the exclamation point, and plenty of them. And because we just need to press down a thumbbbbbb to reproduce any character at nearly no cost, we’re more likely to flood the digital world with !!!!!!.
More here.