Since the introduction of Twig, selecting a Looper field via the insert menu now always seems to generate the Twig code.
However, if I want to use dynamic content in a CSS, for example, it only works with the old system.
Not working:
Working
So either the original code variant should be used automatically in the CSS editor, or a general option where you can set that you always get the original code variant for dynamic content from theme.co.
This is especially important for newer users who don’t know that the old version also exists.