I mean, you're kind of proving the last point by using an emoji in your own message
.
I think punctuation could be over-thought, but the use of new language techniques for conveying tone in written communication is essential these days. Bold / italics / other methods of emphasis and emojis are an integral part of making sure something comes across more or less as intended.
Consider:
"Hahaha, you're funny [emoji38] "
"Hahaha, you're funny [emoji19] "
"Wow, he's really clever!"
"Wow. He's really clever.
"