By design and for the best interest of Bitcoin's long-term survival, the short chain will be [naturally] killed off as outlined in Satoshi's original paper/vision.
It was not the case for Ethereum and Ethereum Classic though. This makes me wonder what Satoshi's thoughts are and how that could possibly happen to Bitcoin. Before the Ethereum split, was it supposed to happen in practice?
Short answer: no it wasn't supposed to happen. At least it wasn't supposed to happen somehow automatically, without an intentional attack.