I am a second semester PhD student. Next year will be my PI's 3rd year at the university and he will be going through the tenure process. I am seriously thinking about switching to the MS track but I am worried that this will hurt his chances of getting tenure. Usually I don't think this would be a problem but he has already had 2 PhD students quit within their first year and I am the only one left. I am very concerned about my PI's career because we have been friends for a long time.
Any advice on how my decision might impact my PI's career would be great.