That's usually not an issue. It's the empty "Hi." and then indefinite silence that's an issue. You wouldn't send a letter with just the salutation, you'd inclu

That's usually not an issue. It's the empty "Hi." and then indefinite silence that's an issue. You wouldn't send a letter with just the salutation, you'd include the message! Why treat a Slack message like it's a phone call instead of like a (short, rapidly delivered) letter?