@SRLevine I have been using Obsidian, and while its not open source all the data is kept in easily movable and preservable chunks in. away that almost non of the other big "note taking/journal" systems have. But yeah I don't know how much of a hassle moving Evernote archives around is and what shape they take.
@liaizon @SRLevine I recently did a mass export on an old account, and discovered a tool to convert Evernote backups to markdown, which is what Obsidian uses. I had to export one notebook at a time, but otherwise it was pretty painless: https://github.com/wormi4ok/evernote2md