Which one is the "main" chain is entirely/ subjective. If users prefer the unsanctioned chain, it can very well be "main", regardless (see BCH/BSV debacle on "w

Which one is the "main" chain is entirely/ subjective. If users prefer the unsanctioned chain, it can very well be "main", regardless (see BCH/BSV debacle on "who's the real BTC", also ETC). Also just noting that while the conversation here is about Ethereum, you are describing the fork rules of Bitcoin. Next month the concept "hash rate" won't exist on ETH mainnet (potentially depending on who you ask; looks like there might be an ETC2).