Community 20.5 might look like a light release, but we have one big update that affects the single most used feature for nearly every customer - the GA of Inline Replies and Threading for Forums! In ...
Updated 6 months ago
Version 5.0
Blog Post
Threaded replies / inline reply editor seems to cause an SEO problem right now. The problem being that topic starter posts and replies have different canonical URLs, e.g. https://community.acme.com/t5/Discussions/What-is-this-section-about/td-p/1417 and the reply https://community.acme.com/t5/Discussions/What-is-this-section-about/m-p/1419 in this made up topic URL have these URLs as their canonical now while previously all posts in a topic should have the td-p URL as their canonical. From a SEO perspective you will get bombarded with warnings about multiple pages serving identical content which has the potential to get your domain penalized.
So until this gets fixed I would stay away from threaded replies.