Not sure about anyone else, but I don’t find the “Site Folder” link that opens your file explorer particularly useful.
To access the theme you’re working on your need to click through:
app > public > wp-content > themes > {theme-youre-working-on}
Maybe a dropdown button that gives you the option of opening:
Site Folder | Plugins | Themes/Active Theme
Or maybe another tab with a list of installed plugins/themes like this feature request mentions?