Earlier quoted context omitted.
I think that confluence can just as easily be replaced by gitlab. Keeping documentation as markdown files in a git repository seems like a great idea. Personally I think it is even better considering ideas like automated checking for outdated documentation and such.
I don‘t know, Confluence allows to easily attach and embed files. It’s a really nice WYSIWYG editor. You can embed draw.io diagrams, you have a lock of „blocks“ and tools you din’t get in a simple markdown editor. It is very (my words) intuitive even for non-technical people and it has mobile apps. I don‘t know how to explain to use git to somebody who isn‘t technical savvy at all...
Fair enough but to some developers who know how to use git it could work. Regarding files and embedded stuff, gitlab could just be used as a file host and webserver also. It think it now displays a download button for blobs.
But yeah, maybe not for non-technical people...