on Writing Forward:
There are a lot of benefits to writing fast, if you can do it. The faster you write, the more works you can produce. If you write for a living, then theoretically, that means more money in less time. Many people write slowly or write only when they feel the urge, so jumping on the write-fast bandwagon can help a lot of writers get more motivated and focused.
But there are some drawbacks to writing fast, especially if writing fast means you’re skipping steps in the writing process (such as multiple revisions) or skimping on important elements of publishing (like getting a professional edit). Deliberate writing and professional-level publishing leads to higher quality work, and if you’re speeding through the process, you might miss some important details and end up with a shoddy book full of typos and plot holes.
Sometimes you have to choose between writing fast and writing well, but most of the time, I think the best practice is to find a balance.