I partially agree. I also want to style unresolved links in edit mode, but there are difficulties in CodeMirror to consider:
Probably not for a while - the difficulty lies in that a CodeMirror mode isn’t as easy to interface for a dynamic status like “is this link unresolved”
Have to remember that CodeMirror is designed to syntax highlight a programming language, for which the “syntax” is static, global and unchanging. Unresolved link is a dynamic status that depends on the state of the app
I don’t have any strong opinions on re-opening, my point was that it makes more sense to focus efforts on WYSIWYG than to make unresolved links work in edit mode, in which case I don’t think keeping this particular thread open makes a lot of difference.
Edited to add the comment in discord.