On the desktop, the look and feel of Joplin is different from all native applications, so it requires a mental switch when using Joplin.
Among many things, I find the multi-pane approach (desktop) unintuitive. For an overview of my notes I need a folder hierarchy (left pane), a notes list (middle pane), and one or two editor panes (yes, the WYSIWYG editor is an improvement).
It would be much more logical and intuitive to have a single notes tree view:
Notebooks
+ Projects
+ Project 1
- _Overview
+ Design
- Designdoc
- Report
+ Progress
- Note
+ Project 2
Right click on a folder in the left panel should give the option to create a new note here.
So I find myself mousing and clicking more than with my current note apps. Even invoking Joplin from the system tray requires two clicks instead of one.
Also, the Synchronize stuff should go to a status bar.
Also, the tags should be a separate part of the left panel, with a fixed (though user movable) separator. Now the tags move with the folder view, and go out of sight if I expand too many note folders.
Also, not using system fonts is ugly:
Even though I try, things like described above make me still use my current note apps.