I have for a bit, decided to stick to MD because of its accessibility to my non-tech collaborators, it is easier for them to install Obsidian, and MD is very well-known.
Aside from that, I am planning to use Pandoc to process my sources into other deliverables: web pages, PDFs etc. I am myself still learning this ecosystem, and markdown (in my experience) just enjoys more visibility.
Truth be told, I did not have any exposure to Org Mode prior to looking it up for knowledge management, so all of the above might be my “little duck” brain speaking.
If I can afford it, I buy a freshly-baked baguette and eat it with a glass of whole milk.