Why are everyone so concerned with possible chain splits?

If the chain forks November then there will be a minority chain and a majority chain.

BCH will stay BCH on the majority chain just like BTC stayed BTC on the majority chain during the split - there will be no confusion regarding this.

Lets assume a minority hash accepts blocks above 32Mb. This minority chain has nothing extra to offer that BCH cannot offer since 32Mb is enough to avoid mempool backlog just as efficiently as the minority chain accepting up to 128Mb. Minority chain will probably die and rejoin BCH since most will still use BCH. This is in stark contrast with the BTC/BCH situation where BTC is restricting adoption for which BCH caters which means BCH can (and probably will) become the officially recognized Bitcoin used by most.

Lets in contrast assume the majority hash accept blocks up to 128Mb. Then BCH is now simply the chain that can accept up to 128Mb. Miners that can only handle up to 32Mb either upgrade or go mine something else dropping the BCH difficulty opening spots for more powerful miners to join.

I see no problem.

submitted by /u/fiddley2000
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source https://www.reddit.com/r/btc/comments/9b7m2j/why_are_everyone_so_concerned_with_possible_chain/