We've quite literally lost 95% of all jobs before. That part is nothing new. However, what we found was that when people were jobless and bored, they found new things to do. Things that nobody ever imagined people doing when they were busying doing other jobs.
It is not like human-level robots are anywhere on the horizon. At best we have simple pattern matching machines that can be trained to do certain tasks. But they cannot cross tasks. A self-driving car robot cannot start becoming a self-practicing doctor robot on a whim. A self-practicing doctor requires building an entirely new robot specialized to do medicine.
Up to this point, each time we lose jobs, the new jobs people invent have become more and more diverse. At one time, 95% of the workforce all did the same job. Now the largest industry employs something like 5% of the workforce. The numbers are getting smaller. And are trending to be even smaller still. It is not difficult to imagine a time when people will all have distinct jobs, that no other human does. The economies of building a robot to replace a single person starts to diminish quickly.