I summarized this:
This discussion is about which version of Font Awesome the Category Icons plugin for Discourse uses.
TechnoFox ([/t/-/277694]) asked what version Category Icons uses, wondering if an upgrade is possible. Firepup650 ([/t/-/277694]) responded that Discourse overall uses FontAwesome 5, so upgrading Category Icons alone would require changes to other parts of Discourse.
TechnoFox ([/t/-/277694]) followed up by asking if there are any plans to update Discourse to newer FontAwesome versions, and what might be preventing that.
Finally, pfaffman ([/t/-/277694]) linked to a meta post indicating Discourse has introduced FontAwesome 5 and SVG icons.
The links aren’t properly formatted. It wrapped the link with square brackets instead of brackets.
([/t/-/277694]) should be
((/t/-/277694)) → (1)