More than a decade ago a bunch of economists with no obvious bias ran the math and said prey much the same thing. With one huge difference, back then the result came out firmly in favour of action because more time was left to spread the investment over. All that happened is the fossil fuel industries threw more money at denial and we posed away the chance to start early and save money.
And worst of all that investment brings worthwhile results whether there's a climate problem or not. Old news that powerful vested interests continue to want buried.