And yet in spite of this very thing happening, Lemmy and Mastodon remain largely unadopted.
Diaspora* existed during the Digg implosion and where did people flock to? No, not the decentralized Fediverse, but to another centralized service. Because it meets their needs. Their needs from a product _aren't_ that it be decentralized. Their needs are that it is easily accessible, that information is easily indexed and searchable, that interacting with users is obvious and transparent, etc.
These are all needs that Fediverse products have not met well because they're too focused on their agenda and their ideology, not their product.
It's based on a metaphor of the body in a physical place, that doesn't really work online. As I mentioned in another comment, this is like offering to give someone a ticket to an exciting foreign city, but before they can get the ticket they have to choose where they're going to eat lunch when they arrive. This alienates people because they have no context for choosing between instances so forcing this choice on them as a condition of signing up is good way to maximize your bounce rate.
It works until it doesn’t: when the host of a centralized community decides to make enemies with its users. This is an old story for many people who went through the Digg to Reddit migration.
Now people have had enough. Our communities are too important to leave in the hands of one company. It’s time for all the people who create 100% of the value on Reddit to have control over their own community’s future.