I have noticed how thunderbird supports usenet. For many people, activitypub is what usenet used to be. Mastodon is a decentralized microblogging site for short bursts of communication. Lemmy is a link aggregator similar to reddit in many ways for long form communication, and pixelfed is an image sharing site comparable to pinterest. I would like to see support for these apps in thunderbird since activitypub is clearly the future.