I believe the primary issue with nearly all note-taking tools is the lack of genuine encryption. Many claim to use end-to-end encryption, but I find this misleading. End-to-end encryption secures communication, not the data itself.
I wouldn't recommend a tool to anyone that doesn't encrypt the data itself to maintain private notes. Its like storing your passwords in plain text.
[1] https://forum.obsidian.md/t/local-file-encryption-of-obsidia...