(I work at Notion)

We support Markdown/CSV "plain text" export, a semantically-rich HTML export, and a PDF export which is just the HTML export rendered as a PDF.

https://www.notion.so/help/export-your-content

It's not the most intuitive export (since there are backlinks, complex hierarchy, databases and all that jazz in Notion pages) but they do return Markdown for every page, CSV for databases (with some information loss), maintain folder structures, and multimedia attachments.

A quick search shows me that Notion exports can be used to populate Obsidian [1] (which implies that there's not substantial information loss).

[1] - https://forum.obsidian.md/t/notion-2-obsidian-migration-inst...

yes, markdown

Unless there's a tangible monetary benefit in doing so, I don't see why that would be a good business decision.

It is likely that there will be some use cases for power users, however one must justify the development and opportunity costs associated with that.