Prefacing this with the disclaimer that I'm not a regular slack user, so I don't know what serves those users best.
Are we currently in the free slack tier with limited history? Would we consider something like using slackarchive.io at community tier to get searchable archives? This also provides for a larger knowledge base for non users. Alternatively, should we entertain migrating to the general ASF slack team and carve out a few channels there? Mike