tbh - when i noticed, i can't delete my account, i instantly stopped going further.
As an european citizen: it might be interesting for you to cover aspects of GPDR, to attract european users (that are forced to use GPDR-conforming data handling).
i found my love in Trilium what has everything i need and if needed, i can still change the code by myself (AGPL) + files are stored as markdown documents (so i am still able to get into my notes, even if the repo would disappear). see
https://github.com/zadam/trilium
TLDR;
- future proof file format (markdown)
- possible as local standalone + sync to simple cloud storage (like gdrive/dropbox/...)