I hope you are right about it not standing much chance. America bit once on Obamacare.Obama proposed the ACA as a transition from employer paid healthcare to single payer. That's a huge change because of all the systems and expectations are built around the current system and even moving to the ACA was a challenge.
Yet, the effort should be worth it as the experience of every other industrialized country country tells us. The percentage of their GDP they spend to cover everyone and produce better results is about half of what we spend to cover a fraction of our population. There are different ways to pay for healthcare. Germany and Switzerland use private health insurers and regulates them like utilities instead of hot stock market stocks while the UK and Canada do it through taxes.
Warren's plan is to use taxes to fund healthcare and no longer use private and company premiums for funding. Because it is a new tax everyone focuses on the new tax and not the end of premiums.
I don't pay to much to it anyway as once Congress gets its hands on healthcare whatever the President wants is secondary to the tons of money that the healthcare system will throw into the mix to protect their profits.