Considering the constant hype I encounter for this online, not so surprising. Perhaps the clear lead from the plethora[0] of similar software? Though Obsidian seems to be getting more popular.
I recall reading about some privacy policies issues a while back [1], I wonder if anything has changed.
[0] https://www.notion.so/db13644f08144495ad9877f217a161a1?v=ff6...