In my experience status is not that reliable, but that doesn't change the result, as you mention at the end. >And even if my status is green but I happen to st

In my experience status is not that reliable, but that doesn't change the result, as you mention at the end. >And even if my status is green but I happen to still be busy for some reason, a chat notification is a chat notification. Saying "hello" is as much an intrusion as saying "hello, I have this problem with <x>, can you help me?" -- except if you just say "hello", then I have to respond and then wait more time for a second intrusive notification to find out what you need. Yup, that's the key. The cost per distracting notification is _vastly_ higher than the cost per word read, so chat notifications should be crafted to minimise individual notifications more than words.