This is a complex topic. My boss may decide to take a sabbatical in one year, starting at the beginning of next summer. If he does, it will be about 16 straight months before he returns. This is of great concern to me. I don’t feel that I can really be completely done by the beginning of next summer, but I do have to be out completely (that is out of school completely) by June 2010.
Now, if my boss splits at the beginning of summer 2008 and comes back just before Fall of the following year (late September/early October 2009) that will kind of leave me in a strange situation. While I am well on my way and don’t need a lot from him for specifics of research, it is unsafe to be in graduate school without someone who is looking out for you. (even small technical points like who do I go to in order to sign up for thesis credits? Who defends me at the department discussions of grad students? Who keeps the money flowing and the floorspace available?)
More concerning than that is how will the laboratory be managed during his absence? I am not technically the senior grad student in the lab, although I am usually treated as such. I have no authority to run things, nor does anyone else. To make matters worse, other people need to use our laboratory resources periodically. Who handles that?
Ugh.