I am a data scientist, combining applied math with programming and devops. I have been at the current company for 8 years now, which is basically all of my care

I am a data scientist, combining applied math with programming and devops. I have been at the current company for 8 years now, which is basically all of my career so far (spent one year abroad). I did a part time gig with them already during my studies, which was pure luck. Regarding my deams, I don't know whether I should be 95% happy with all that I've got already or try to chase something else. A significant portion of my colleagues have stayed for more than a decade, some had changed jobs but came back after a few weeks or years.