This will surely not be possible in Joomla 6
But for later versions .. let's see

This will surely not be possible in Joomla 6 But for later versions .. let's see

@chmst why won't this be possible for Joomla 6?
Joomla 6 is still in Alpha, there hasn't been a freeze on new features for Joomla 6 yet.

The only downside I can see is all of the places in css where "Font Awesome 6 Free" is hardcoded as the font family. However, FontAwesome does provide official css variables that are available in version 6 and 7 that could be used in place of hardcoding a version number.