So Satoshi Bitcoin will split to Chinese Bitcoin and Blockstream Bitcoin.
If only core developers were capable/motivated/competent to find a solution to increase block size so that people can continue using bitcoin without paying ridiculous fees and insane confirmation time.
Anyways, if there is a split then BTC will not survive as BU needs 70% miner support and if there is 70% support, even less than 50% of those miners can do a 51% attack on BTC, so BTC will need to change their POW as they are planning now, at that point BTC will no longer be BTC but just another altcoin, and a technically inferior coin to many other altcoins.
So why wait for everything to fall apart when the only option is to choose an altcoin and start using it.
Even though a split is unavoidable but bitcoin will not be a goner with just the reason of a split. If that is how people view it and it is the truth then bitcoins price is already at 100$ right now. But as you can see bitcoin has survived the storm and can survived many stronger storms to come. The community is ready to face whatever the odds bitcoin will face. As long as the community trusts bitcoin it will never crash.