Right now, wikitext of the form
# <li value="N">List item content
needs to be added to start an ordered list from a number different from 1.
Under Remex, this outputs as
<li class="mw-empty-elt"></li> <li value="N">List item content</li>
While skins currently will set the class to display:none, they shouldn't have to for this use case because the parser should probably not output not-great HTML.
It would thus be valuable to have first-class wikitext support for the notion of an ordered list item value. Something like the table syntax might be reasonable from a learnability perspective (with all of its pitfalls of course):
# value="N" | List item content
Such syntax could be extended to other attributes, such as the globals (class, id, etc.).