I think UBI will be the norm by 2030. Though the way I see it playing out is that initially most countries will just opt for stronger safety nets with means-testing. The point at which workers' livelihoods are clearly being automated in mass is where it will start to become politically feasible to implement the UBI. I think UBI is too radical for the baby boomers, but more palatable for the youth who've been massively screwed over their whole lives and are more aware of how rigged the system is.