My experience has been that there's somewhat of an age divide. I've noticed that fellow junior academics are far more likely to prefer LaTeX, while all senior collaborators I have ever had, preferred Word. So I end up using Word for everything to ensure that it is easy for them to edit/review the paper.

Word is good for collaborative editing, but not very convenient for version control (and version control is very important when using AI assistance). So lately my strategy is to draft in Markdown, then copy over to Word once the draft is at a point that I might be okay sharing it with collaborators.