It's been pretty difficult to scale Mastodon to even hundreds of thousands of users per instance when the users are following others across thousands of instanc

It's been pretty difficult to scale Mastodon to even hundreds of thousands of users per instance when the users are following others across thousands of instances. Scaling that up to 30 million users is not easy. And you can tell the initial launch was rushed based on the limited app-only roll out, minimal features, and broken website. It's plausible that they will work on features and user growth first.