I’ve been looking into Joplin and LogSeq to potentially replace Obsidian. My issue with both of them is that they don’t seem to offer hierarchical organization. I want to split topics into different folders, with sub-topics in sub-folders.

This feature is a must have for me, and OP’s app seems to fulfill that while also being open source (unlike Obsidian). Tbh, it seems like it’s mainly a drop-in replacement for Obsidian (which is good imo) if you’re not using Obsidian’s sync system