If people are going to be able to move freely between servers, the metaverse will probably need a decentralised identity and trust system. This is a major unso

If people are going to be able to move freely between servers, the metaverse will probably need a decentralised identity and trust system. This is a major unsolved problem in internet engineering generally. The web would also benefit from such a system, but it's maybe less critical for the web, since most websites only contain information that is broadcast to users, and the users can't manipulate the state of the server or interact with other visitors.