It was actually sort of a solution to the Ethereum sharding problem, scaling problem. And you kind of made this protocol this idea, but then added the additional abstraction on top that each shard can be different from the other one. Even today, when we're talking aboutthereum sharding, they're talking about all shards being homogenous. But it was just a logical implication of the protocol as it was that was meant to be just a sharded variant of Etherum.