Great question!
Honestly, my current inclination is to keep the replies for archival purposes, but minimize them somehow so the topic feels a bit less intimidating. Most of the replies are just no longer relevant for the current plugin, and if folks read them for any practical purpose, i.e. using the plugin, then they may get the wrong impression.
I think deleting the replies would be regrettable as it’s nice to have a record of the plugin’s development over time, but if there were some way to easily minimize them by default, that would be ideal.
We are already handling ActivityPub support and documentation in other topics, and the OP already reflects that in its brevity and use of links. The plugin topic itself is more of a “catch-all” for folks wanting to discuss/ask about the plugin.