One reason why Mastodon, being part of the Fediverse, is great, is that whenever the next big thing pops up (let’s say the Mastodon of The Future), and it stays within the Fediverse, we will all stay connected. No more “starting over” our networks from scratch.
We all have friends and family who are like “so you want me to switch to Mastodon now? Last year it was Signal, and before that Telegram. I can’t be starting over all the time. I’m sticking to Whatsapp and Twitter”. Now they won’t have an excuse anymore. After switching to the Fediverse we never have to start over again.