Fix it by simply turning off “Low Disk Space” warnings in System Settings.
Mix that with keeping your / and your home cache, local, share etc directories in a non-data drive and you get no warnings. Only errors when a write fails.

markdown is so easy to learn

Only for those who want to.
Although someone playing DnD would probably not mind putting in the few minutes required.

This should open it to being used collaboratively.
Then I can convince wherever I work, to use this instead of going with other MS stuff?

I am considering using ???.
Will get to it someday.

OP seems to be looking for LibreBoot compatibility, so it might not be as easy.