The answer I often read is that assuming the MAHF is actually successfully accomplished then core will(?) switch to a new Proof of Work algorithm that will allow more small miners which will increase the difficulty of miner hard forks in the future.

The question is if the current MAHF happens, and the exchanges stay with the majority hash power, what will attract regular people to the legacy Bitcoin chain.

I guess if all this actually came to pass and the legacy POW hard fork happened there would be an effort to get legacy Bitcoin back on Gemini and Coinbase and Bitpay as a different coin.

Then the question becomes under what symbol would these exchanges present (ouch) since they have already reportedly committed to having the BTC symbol follow the existing majority hash power which would (in this scenario) be Segwit2x

Sounds faintly familiar to Ethereum Classic and Ethereum if the miners and exchanges stay with their public pronouncements.

Admittedly, I'm brand new here so maybe some expert hands can fill in better answers on this scenario end case.