There's also something to be said about extreme design simplicity and resilience to change. Bitcoin is already really good at this, but when the system design is so simple that any change looks invasive, it ossifies even sooner and makes changes even less likely. Removing opportunities for discussion (e.g. scripting support and opcode discussions) also removes opportunity for conflicts regarding a protocol feature. Simpler design may come at the cost of slightly less expressivity, but at the benefit of being naturally more resilient to change.