I wasn’t talking about markdown language. I was talking about the end user experience. In my email client for example, I can write a single line break and it is formatted as such. The end user shouldn’t have to know/worry/care about the underlying technology; the technology should work to meet their needs.

Thank you for the explanation. Good to know single line breaks are possible. However, other web services allow the user to use a single line break and it’s displayed in the same way. While you give a good technical reason why it is this way, I’m not convinced it’s the most user friendly approach.

For those interested, the case is Rogozinski v Reddit Inc, U.S. District Court, Northern District of California, No. 23-00686.