* When uploading a large file using drag-and-drop in the web UI, there is no progress indicator... There is a progress bar if you use the file upload button instead
* When a conflict occurs, I would expect a graphical file sync client to show a GUI letting me select which version to keep (or both); Nextcloud just renames one of the files
* The app in dark mode on macOS looks pretty bad and has white text on yellow background...
I could go on and on :(