It helps and it harms at the same time. It provides the opportunity to write concisely and well, and the temptation to drone on for ever. We get both sorts here, sometimes from the same people.

It's always been the case that it takes far more time and effort to write a good short piece than a mediocre long piece. "Sorry this is so long - I didn't have time to write it shorter" is a time-honoured writers' excuse.