People were worried when Mastodon went from 20,000 to 500,000 people too. I don't see why you would think 1mil -> 2mil to be any different. I really don't agree with the comments that suggest that Mastodon shouldn't grow.
@Gargron I think as a community we should acknowledge their fear and make sure they feel heard. That is fundamentally what twitter has failed to do.
From a technical perspective we're not worried about shitlords ruining it but that doesn't mean that people who were traumatized on twitter share our confidence that the new system will protect them.