Think of it as insurance for future disruptive tech that might come along. It allows a path tnintegrate the best future ideas we haven't seen or can't anticipate, while keeping the slow, conservative and predictable Bitcoin infrastructure we all love today.

Instead of some centralized shitcoin like ETH sucking up all the brains and energy in market driven innovation , DC allows that energy to be spent on a real decentralized and permissionless crypto, bitcoin. Zcash has been implemented and a few other ideas. So next years, or the decades after its, best new idea, can be launched, supported by the bitcoin infrastructure, tested by the free market , all without endagering BTC core with soft or hardforks that have unintended consequences.