There's a line between rude/toxic and direct/pragmatic. The whole world at large would be much better off if we made that distinction. Also, that both tones can be found in the same piece of prose; we don't have to label a whole piece as one or the other.

> If you want a dataflow graph compiler, build a dataflow graph compiler. > This is not 6 layers of abstraction, it's 3 (and only 2 you have to build).

This is direct and pragmatic. It states the writer's justified true beliefs and opinions as plainly as possible.

> Plz bro one more stack this stack will be good i promise > bro bro bro plz one more make it all back one trade type beat

This is just toxic. The writer is making assumptions about other people's position that he does not (and probably could not) substantiate.

Ironically, sprinkling in toxic comments and back-handed insults in any piece has the effect of making said piece less direct and pragmatic.