okay, thank you for your replies. It seems that Bitcoin wont' suddenly rip in half overnight.
But wait! ...Ethereum did...suddenly there were 2 seriously competing versions of Ethereum.
So what's the difference? that means ETH suddenly split in half but Bitcoin won't do the same? Is Ethereum not supposed to have a sort of clever consensus system also?
Ethereum has a leader that everyone follows and a smaller userbase most of whom had a serious problem that the ETH rollback would solve.
Bitcoin's far more diverse and there's a lot more riding on it maintaining its integrity.
I have seen almost no one other than the tiny group hawking it state that they want Unlimited. If it did happen then it would be a sad demonstration of Bitcoin's centralisation and I'd be walking away. No doubt many others would too.