> In the past, "labor saving technology" has always spawned alternate jobs that people could take with some retraining.

Labor saving technology does not create enough alternative jobs to employ all those that it displaced, otherwise it wouldn't be labor saving.

Instead, the surplus created by these technologies allows that society to deploy labor on less immediately necessary jobs. These jobs weren't created by the technology, they were always there, but society did not have the resources to staff them (think education, research, academia, merchants, etc.)

This dynamic has been true since pre-historic times, so you'll need some extraordinary evidence if you want us to believe this time is different.