Yes I'm sure, this is an expert opinion. Ethereum and Etherum Classic follow separate, incompatible rules. If Etherurm Classic were ever to pass Ethereum in value, nothing dramatic would happen.
If we end up with Bitcoin and BitcoinSW, and BSW is the minority (like Etherum Classic), we'd have a situation like today. Except, if BSW were to ever catch up to Bitcoin in total work, when it passed Bitcoin (51% hashrate is enough to cause this), it would obliterate the original chain, and become the only chain.
This property is why we gave it a new name (UASF).
If we end up with Bitcoin and BitcoinSW, and BSW is the minority (like Etherum Classic), we'd have a situation like today. Except, if BSW were to ever catch up to Bitcoin in total work, when it passed Bitcoin (51% hashrate is enough to cause this), it would obliterate the original chain, and become the only chain.
This property is why we gave it a new name (UASF).