Because it's while it has been happening and even accelerating for the last century(and longer), it is only now hitting a threshold/momentum in the past few ye

Because it's while it has been happening and even accelerating for the last century(and longer), it is only now hitting a threshold/momentum in the past few years. We are now standing at a precipice of a substantial amount of people being automated with unlikelihood of them going somewhere else. Although predictions are unreliable, there is strong evidence that there isn't just going to be "more jobs somewhere else", like has happened in the past when things were automated or optimized (e.g. farming) UBI discussions and increasing proponents are an outcome of this, not the other way around.