> I feel like people complaining about this didn't grow up in the IRC/IM era. At one time most written language didn't put spaces between words (some still do)

> I feel like people complaining about this didn't grow up in the IRC/IM era. At one time most written language didn't put spaces between words (some still do), and many languages don't write vowels. That's not a good reason for doing the same in your informal English Slack messages. You can write an informal message and still use punctuation.