@Gargron no one expects 100%... But if Mastodon focused more on building (and rebuilding) a healthy graph early in the user lifecycle (e.g. first step after signup), churning users would be < signups and this would be a growth story. External tools like Movetodon help, but the tried and true model is 1) mobile address book matches for strong connections, and 2) a much improved (and centered in the UX) recommendation API for weak ones.