Regardless of how many newlines you type in your actual app review or reply, the store just renders everything as one huge wall of text (with no newlines). This limitation is just ridiculous, because it makes it hard to write a coherent review with paragraphs or a list of issues / steps to resolve a problem. Same goes for review replies.
Also, if you type in a bunch of text in the review input field, but you accidentally click somewhere else, you lose all your work without any confirmation.
Very disappointing all around, especially since it's been like this for years, and apparently nobody has wondered if this is an optimal user experience.