Full. agree on the data loss issue. I have experienced it myself, and their forum and issue tracker also show this. Its not a « trusted system » at all.
My main note tool for years has been Obsidian (using Obsidian Sync on Linux, Windows, Android, and iPhone). Works great for regular notes.
I don't think it's very good as an outliner, though I haven't tried the recent outliner plugins, so maybe things have improved. I do my outlining with org-mode on Emacs because of my dissatisfaction with Obsidian in that area and lost data on Logseq.