Hey @jasonsmith, another PM for Mattermost here. thank you for your thoughts - I agree with you in that ! doesn't seem intuitive. We were thinking we may want to save the symbol as a tag for something else more appropriate for an exclamation mark. And yes, adoption may be a bit slow at first, but we hope it will catch on regardless of which one we use. As for having # being used for both channels and actual topic hashtags, we see the system getting confused over whether to link to a channel or a hashtag topic. What do you think of using + or ##? For example:
Let's go talk about it in +Marketing
Let's go talk about it in ##Marketing
Let's go talk about it in !Marketing.