For those of you in lab based fields do you think lab rotations are actually better than the committed advisor model where you join a specific lab from day 1? I did rotations and ended up in a great lab, but I also feel like I wasted most of my first year doing rotations in labs I was never seriously going to join. A friend in a mat sci program picked her advisor before she even started and was already collecting data by month 2. Meanwhile I was still doing my third rotation lol. Curious what people think is the flexibility worth the time cost?