Occupations like computer (human form), typist, telephone switcher, all became completely eliminated when the PC came out. Jobs like travel agents are on permanent decline minus select scenarios where it is attached with luxury. Cashier went from a decent nonlaborious job to literal starvation gig because the importance of a human in the job became negligible. There are many more examples.

Some people managed to retrain and adapt, partially thanks to software becoming much more intuitive to use over the years. We don't know how big the knowledge gap will be when the next big wave of automation comes. If retraining is not feasible for those at risk of losing their careers, there better be welfare abundance or society will be in great turmoil. High unemployment & destitution is the single most fundamental factor of social upheavel throughout human history.