The concept of instances is already too much friction, and will surface beyond the initial "choosing an instance" issue. What happens when your chosen instance

The concept of instances is already too much friction, and will surface beyond the initial "choosing an instance" issue. What happens when your chosen instance shuts down because of lack of funding, or gets pwned because of an admin careless with security, or the admin is a malicious actor and starts messing around, or there is some (whether justified or not) inter-instance drama and as a result yours is getting cut off from the rest of the network? Instances shouldn't be a thing. They are not a thing in conventional social media platforms the fediverse is trying to displace, and those conventional social media platforms displaced the earlier iteration of the fediverse aka forums and websites because most people don't want the extra friction and overhead of maintaining a server and having mostly-isolated communities. Non-ActivityPub implementations such as Nostr actually have a better chance at displacing conventional social media because "instances" aren't a thing; the network isn't balkanized and clients are in charge (so inter-instance drama isn't a thing) of fetching content and choosing which content to display, with relays acting in the background and mostly being replaceable (cryptography ensures relays can't actually tamper with any content).