The evidence strongly supports that a predominantly renewable energy system is both technically and economically viable by mid-century, with wind and solar already being the most cost-effective new electricity options in most markets. However, the feasibility of this transition hinges on overcoming significant non-technical barriers including policy frameworks, infrastructure development, and political will. Claims that renewables cannot reliably power modern economies are not supported by the evidence, while claims that the transition could be completed much faster (within a decade) are also not realistic given the scale of infrastructure changes required.