I'm sure that installing Atom and VS Code would introduce me to two more file pickers. Having just checked, both Atom & VS Code use the GTK/Gnome file picker.

I'm sure that installing Atom and VS Code would introduce me to two more file pickers. Having just checked, both Atom & VS Code use the GTK/Gnome file picker. LibreOffice is also using the GTK/Gnome file picker.