Welcome @bjornte. There has been extensive discussion about how line breaks should work in the default line break handling is inconvenient topic. I find - to be the most convenient list marker as it does not require the use of the shift key, unlike + and *. Without a list marker it would be difficult to determine if the item on the new line should be part of the same list. Perhaps a case could be made for defining list blocks with no markers (as an extension).