@LeonardoDiOttio Scaling any service to millions of users requires some expertise that most developers and devops never get unless they work for one of the large companies, and from what I understand, they did not poach any FAANG people. Add to that that their developers did not actually develop the software and may lack critical understanding of its internals, and it starts to look like what we're seeing...
@Gargron @LeonardoDiOttio It would still be interesting whether Mastodon in its current state would be able to scale to 1.5E6 users on a single instance (on the other hand given the federated design it doesn't have to).