I long for the day I can just write reformatted code in Markdown, GitHub style -- with three backticks and a language declaration --- and Slack syntax highlight

I long for the day I can just write reformatted code in Markdown, GitHub style -- with three backticks and a language declaration --- and Slack syntax highlights the colours correctly within chats. This is such an obvious improvement for developers who share code constantly via Slack. In fact, such an improvement, I would seriously switch chat apps to get it.