In the AI age having all of your files in markdown and away from AI enabled providers is making more and more sense.
I know of several AI companies who use bespoke tools because otherwise their data would be shared with their competitors (e.g. notion -> openai, gdocs -> google, etc).
It used to be that putting your docs on google "felt" safe because it was unlikely that some random google employee would read you random company docs. Now it seems unlikely to me that they aren't reading every doc with AI.