It's not more polite to wait for the other person to go through a hi-hi handshake process to make sure you have their full attention before just asking your question in async communication.

If anything, people are trying to port their face to face comforts to digital async communication where it doesn't make sense and has the opposite effect.

Though I'd argue that the "how are you" frivolity that nobody takes serious doesn't make much sense face to face either. So it's only doubly unnecessary when you make someone go through that in a work Slack setting before they can unlock when you're actually pinging them about.

It's quite impolite once you think about it. Respect other people's time and get on with it. Every time you ping someone, realize you may be interrupting them, so get to the point in as few pings as possible.

You call it insane, but it's actually common sense once you think about it.

I think the point is that basic politeness involves not appearances of being polite, but rather thinking of the other person, their time, and how you would feel if the roles were reversed. I do agree though that going as far as to register a domain for this one social quirk is a bit much.

The author doesn't seem to be that annoyed, they're just trying to make life easier for themselves and others.

It's equally polite to say "Hello" and type the question in the same message. Do you genuinely not see how saying "Hello" first, which for many people forces them to lose concentration as they mentally prepare to be asked a question, is worse? The author provides multiple, equally polite examples that respect people's desire to politely greet others and respects the concentration of the receiver.

Trouble is it is impoliteness.

  Q: Are you listening?
  A: Yes
  Q:
  A: ?
  Q: [typing]

Politeness would be preparing what you're going to ask me before requesting my attention.

What's polite in verbal conversation is not necessarily what's polite in realtime text communication.

For texting, requesting someone's attention and then wasting their time is rude. Get to the point quicker.

It can definitely be annoying because sometimes the latency is long. For example, I may be in another window and not see the "hey" right away. When I reply, I may wait half an hour for the person to explain why they messaged me, but I won't know how long I'll wait when sending my reply. I don't think it's a problem if someone says hi, then immediately types their question. But if they wait for an ack it can be kinda silly.

You can add the niceties all in the same message, as the website describes. The initial message can contain the greeting, the hedging about not wanting to bother someone, and also the specific question and details, and any other needed information (error message, traceback, whatever). So much time is saved by just including it all in one message, separated with newlines where needed.

politeness is also not wasting my time.... I have a limited amount of it

Good: Hello, can you help me with <<<explain the problem or request>>>

Bad: Hello.. <<wait for response>>

Chat is more like email, less like phone call treat it as such