This goes back to mastery, autonomy, and purpose as key motivators / engagement of workers today. However, purpose and quality of coworkers are what's different

This goes back to mastery, autonomy, and purpose as key motivators / engagement of workers today. However, purpose and quality of coworkers are what's different from the two which means that motivation and job satisfaction are at least correlated and that the differences may be better explained with models based more around relationships - relationship with oneself is a big part of finding purpose in life or career, after all in the western world.