If you look at it from a utility perspective and discount the network effect, at a certain point, it becomes economically incentivized sharding. "We accept any

If you look at it from a utility perspective and discount the network effect, at a certain point, it becomes economically incentivized sharding. "We accept any of the 2021 or prior World Bank approved ETH forks." Your multi-wallet client automatically chooses the one with the lowest transaction fees (also economically regulated).