Daniel Glazman wrote:
> 
> (a) the l element is purely presentational: it _is_ a line. It's not less
>     presentational than <br/>.

I dispute that. In some contexts, a line is semantic. Not so in prose
paragraphs, perhaps, but certainly in poetry. It's important enough
that when verse quotations are collapsed into paragraphs, the line
break is preserved as a slash.

> (b) it is useful only when you have a list of adjacent lines. So it's
>     basically a list (ul/ol) with list items (li) having no marker and
>     no wrapping.
> (c) using ul/ol/li instead of l makes it MUCH easier to number lines
>     since you have a known container to reset the numbering.

Listing the lines of a sonnet in an OL is IMO ridiculous. It is in no
way a list.

~fantasai