They absolutely care if one day Atlassian decides to hike prices to levels they deem unreasonable and now their entire documentation is locked in a proprietary format or if Atlassian go under, are purchased by a competitor etc.
> I have never heard nontechnical people complain about the Confluence wiki. From their perspective, everything Just Works.
This has not been my experience at all. I've had tons of business analysts join in the Confluence moaning during meetings, both for editing and trying to find stuff. 'Just works' is not how I or anyone I worked with would describe it.
>all the things that they can't do because of Markdown's limitations
what are these things you're so desperate to do in Code Documentation that you can't do in markdown?
> how much harder it is to do drop-dead simple things like adding tables.
This has been a solved problem for a while now. One of the very first Obsidian plugins was the advanced tables plugin which makes it super easy to make and edit tables. There's also other apps like Table Flip. I'm sure there's probably plugins for other editors like VS Code or Table functionality built in to other markdown editors.
The only reasonable point you've got is about git. Like I said in the original post, a WYSIWYG web interface for non-technical folks which just auto commits would be preferable whilst still allowing regular git and markdown for technical folks. There's also nothing stopping anyone from doing an intermediate page if conflicts are detected with a three way conflict resolution page a la Jetbrains Editors with a magic wand auto solve. Maybe the WYSIWYG editor could automatically update if changes are detected a la Google Docs. There are lots of potential ways of solving the 'git hard' issue. There is also the built in Obsidian Sync and Publish which use git behind the scenes and give you access to full version history although I don't know if they scale well or not.
At the end of day, conflicts in documentation are less of an issue when they do happen because they're not going to cause an entire crash of a program, you're just going to have some text that doesn't make sense. In the very worse case scenario non technical people could just copy and paste things back into place from git history. Other than time wasted, it's not the same disaster as if a code conflict is not resolved properly.