[LAC-Tech]

Yeah that's what I default to. Or maybe even "Morning, how's it going? [question here]".

I like to be friendly but also to not to waste time by doing some kind of weird manual slack handshake protocol.

[disgruntledphd2]

In slack at least you can insert line breaks so the pleasantry first, line break, then question.

[distances]

Exactly this. All in one message, not so that you send the first "Hey" and then formulate the main question for a couple of minutes while the other person is already waiting.