[bobthebuilders]

Wow I never knew I "can already build such a system yourself quite trivially by getting an FTP account, mounting it locally with curlftpfs, and then using SVN or CVS on the mounted filesystem".

This is why people use Obsidian.

[deafpolygon]

Plain-text folder on a cloud sharing service. Edit with notepad.exe or whatever editor you prefer. Others have been doing it with .doc files forever, or .rtf.