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.
Sounds that you are one the fanatic enthusiast of the altcoin which you think that those can possibly kill and destroy the capability of bitcoin.
But you are totally wrong with your speculation. Since bitcoin is the King and Mother of all cryptocurrency it will never be happen that there's someone can replace bitcoin especially with the price is far milestone other altcoins. And I know more community will embrace bitcoin and the demand will get more increase in the near future.