Small notes to be answered rarely.
I’ve looked at the early Usenet archives, and typical posts there resembled this format quite a lot. It’s later that Usenet became a place where you write long considerate posts, and also expect rather quick answers.
It’s actually interesting to communicate in a rare terse format.
The reason I don’t use Twitter, BlueSky, anything like that is - I don’t have a scenario of it being useful for me.
There are upsides to Twitter, but having to follow somebody and to register is a no.