Elephant is a notetaker with a classic interface you already know.
Keep your notes to yourself. No accounts or clouds. For syncing use Dropbox, Github, rsync, ...
No feature bloat or redesigns, ever.
Elephant stores notes in plain files and folders. No databases and no migration.
Cross-platform for Mac, Windows and Linux.
Built for longevity with a classic interface. New versions will never offer weird functionality. There will never be a chat feature and it will never show stuff from Financial Times.
Premium is free, no ads. Open source.