Emojis (and before those, emoticons) help fill in the tonal gaps created by lack of body language and voice contexts, so yes that makes sense.
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This is exactly the reason I love sticker packs in Signal so much, they add an extra option for tone/body language while also reinforced shared favorite media with friends/family. Binge a TV show with your partner? Make a sticker pack out of it and now you get ti show how you feel and reinforce the shared experience.
Damn, beat me to it. Always hated texting due to the lack of context and ease of misunderstanding. Never thought much on emoji content until I read the article. A reply without an emoji can be hard to parse. I had formerly relied on punctuation, but lately I use more emojis.
"Want to go out tonight?"
"sure"
vs.
"sure!"
vs.
"sure 😃"
LOL, the last response made me feel good and it's not even a real text!