Thank you for this great read Graham Linehan. I like to correct one thing. The link to the Mastodon Project is not mastodon.social, but https://joinmastodon.org. mastodon.social is just one of the many instances that can fluently talk with other instances. OK, it was the first one and the so-called flagship, but there are now much bigger ones and hundreds of other great instances maintained by passionate people (like mine at https://todon.nl). Although some people like to sign-up on multiple instances, to sign-up on one instance is enough. You can talk with anyone on Mastodon (and the rest of the so-called fediverse).