Comment by chrismorgan

Slack messages are formatted in mrkdwn <https://docs.slack.dev/messaging/formatting-message-text/#ba...>. Completely unrelated to Markdown, superficial resemblance only. If there were trademarks in play you’d absolutely attack them for trademark infringement.

But what you type isn’t even mrkdwn, but rather an input mode that supports most of the same syntax.