Good take on generational considerations in politics. Globally the 'establishment' is increasingly being exposed and becoming irrelevant. Whether left, right or centrist. The consequences for the majority essentially remain the same. Fresh and different will have appeal, not because it is rational, principled or alternative: simply because it is challenges and disrupts convention. Hence Macron, Trump, Trudeau. 
In SA context the irrelevance of the liberation movement is accelerated not only by its many inadequacies but a global phenomenon that nothing materially will change for the majority. Politics will in time be defined by alternative social constructs creating natural and ongoing checks on power wherever it forms and finds expression. Hard to envisage but not unlikely. Once off elections are what we are saddled with for now. It is hard to envisage a continued relevance of such ad infinitum. Welcome to the real world SA. Not so special after all are we?