What I would like is something like @firstname.lastname@example.org for publishing posts, but a single-user instance of #mastodon for interaction. Microblog's interaction tools are still quite cumbersome. I think I'm going to try to cobble together an #activitypub enabled WordPress instance and hang a Mastodon instance off a subdomain. It appears one can provide a
WEB_DOMAIN env var to Mastodon (https://docs.joinmastodon.org/admin/config/#web_domain) to alias it to a different domain to is primary domain, but I still have to work out how all the webfinger verification shenanigans work.