But you don’t have any incentive today to keep things interoperable at scale, actually, the opposite is true today - the more users get into nostr, the more centralized it becomes.
Recently as far as I know latest consensus - this is not important vector to focus on and there is only hopium so called outbox model would solve this problem
There is centralization at the start where there isnt enough demand otherwise. As demand for a service type increases, alternatives are built creating decentralized choices. Protocols must be open, or else a first mover risks being eventually silod.
What makes demand for relays increase in future? Do you believe nostr onboards millions of users and they all understand the value of censorship resistanceness and they would pay relay operators directly for holding their data?