Same fab, same experience. I would add that a deep understanding (and ability to explain) statistics was more critical than understanding the underlying device physics for most roles I encountered. Enormous amounts of noisy data, characterizing several hundred process steps, is harnessed to apply massive pressure on engineers to "fix" problems that might just be a statistical blip. Economic stakes of minor yield deviations are so high that you often have to act as if something might be wrong before signals reach statistical significance. I bailed after four years, but it was great experience to start my career.