I personally think anyone who constrains a writing format for a creative writing process is operating with a scarcity mindset. Having been on the receiving end of a lot of "glass half empty" critiques, I feel this goes for editors, advisors and random advice on websites.
Don't ever let anyone's opinion (even mine) crush your ideas.
The point of any artistic endeavor is artistic freedom (and artistic license). If you want to mix up all your fonts and make your writing look like a ransom note, go for it. If you want to print it all backwards so it can only be read in a mirror, go for it. Write it in Klingon. Write each character in a different color. Make all your letter B's look like little bunnies.
It's presumed that you (the writer) understand and accept the premise that there will be people who just won't like what you're doing for a variety of reasons. However, that will be true even if you "follow the rules". (Just like life.)
If you're writing for a formal purpose, you write in a formal format. But if the work is creative, then it should represent the style of the creator, for better or worse.
I do agree a bit with the above comment regarding "let the reader get to know your characters (and your writing) first before shifting to a 'short-hand'."
That said, when I write a dialog scene, often my characters will engage in a quick exchange, representing perhaps an energetic and enthusiastic transfer of ideas, and I will write it in a script style deliberately for it to "read fast". Non-dialog prose will be added to represent a thoughtful pause, or dialog break.
Similarly, in a high-speed action scene, events can be written in short sentences as whole paragraphs, in order to "read fast".
Rather than "ignore" the reader comfort, I feel this is actually taking the reader completely into account, making the delivery more relatable, not less.
Just my opinion.