Unless there are other bodies to interact with, in which case maybe not.

Well the whole purpose of that nuclear booster stage was to cut transit time to
2 or 3 months each way? I dont think a 3 year trip is a viable idea. Beyond
which they should build a sooped up emergency supply vehicle for have to have
stuff that could cut that time even futher. It would need radiation shielding
for the crew so it could be light weight too. for faster journeys