I agree with others here that the world will more/less be the same. People who love life will stay and continue living no matter what, and the beneficiaries of such a method being widely available would mean that those who really do want out will do so peacefully, reliably, and with dignity instead of resorting to barbaric, unreliable, and traumatic methods that may even cause collateral damage to others. Of course, there will always be some vast minute group of people who just want to make a statement or create as much trauma as possible, but fortunately, they are very, very rare, as most suicidal people just want to exit and those that are desperate enough to exit will choose a peaceful method versus a barbaric and traumatic one.