Arkinslize Possibly, if a writer is after verbatim. The feedback return rate can help with growth.
From my experience, skill development should also have a level of quality to strive for. Speed is just one part of the equation.
I've found, it's realistic to have a balanced approach when writing.
Hiatus occurs when one part of living outweighs the other. If churning out chapters by speed of reader demand becomes too much of an impact on other offline responsibilities (school, jobs...), writing typically takes a back seat. Should a hiatus occur, that could be a stop towards further skill growth. As the skill isn't being used.
In my view, new writers are best to focus on solid basics towards a personal best completion of their first draft. When writing for the first time. It's better to focus on finishing about 70% -100% of the story in an unpublished draft state.
Set aside a realistic time schedule to work on chapters. Publishing the first chapter after 70% -100% of story completion gives some leeway and takes advantage of post scheduling. Then it's just a matter of checking for feedback and correcting accordingly.
If new writers share out their in progress story as they go (without stock pile), and just focuses on speed by reader demand/expectations, they'll limit chances for improvement. May even cause a burn out. The WIP might take a turn they didn't want to take, but it's not going to be easy to fix as they already have readers following the current story line. New writers are likely not going to have the skill to be able to lead the reader seamlessly down the revised plot line whilst the story is written on the fly.
I've seen new writers, over the years, give up the craft because they can't achieve both quality and quantity at speed of demand due to lack of skill. It becomes a chore rather than a joy.
In fact, the more new writers improve on their grammar and storytelling skills, the faster they can churn out a chapter. As they'll be able to naturally write a quality chapter on first submit. Albeit with a few minor grammar slips and typos to fix up here and there afterwards.