Does the success of Sci-Hub prove that Open Access has failed?

"Toby Green published an article dealing with new impulses for Open Access. The starting point is the success of Sci-Hub. First, he explains his key points: „Sci-Hub has made nearly all articles freely available using a black open access model, leaving green and gold models in its dust“ „Why, after 20 years of effort, have green and gold open access not achieved more? Do we need ‘tae think again’?“ „If human nature is to postpone change for as long as possible, are green and gold open access fundamentally flawed?“ „Open and closed publishing models depend on bundle pricing paid by one stake-holder, the others getting a free ride. Is unbundling a fairer model?“ „If publishers changed course and unbundled their product, would this open a legal, fairer route to 100% open access and see off the pirates?“