”Once exclamation points were scary and loud; they made you jump,” Heidi Julavits wrote in her 2015 memoir The Folded Clock. “You were in trouble when the exclamation points came out. They were the nunchucks of punctuation. They were a bark, a scold, a gallows sentence. Not any longer. The exclamation point is lighthearted, even whimsical.”
The use of the period is one example of situational code-switching: When using one in a text message, it’s perceived as overly formal. So when you end your text with a period, it can come across as insincere or awkward, just like using formal spoken language in a casual setting like a bar.
We are living in a hell-scape of overburdened punctuation marks…
Related: I’ve just spent an hour reading about punctuation marks!