If you have ever worked on films or read up on the process of filmmaking, you will discover that scenes, more often than not, are shot out of sequence and edited together later on. This can be due to location restrictions, weather, scheduling conflicts, and a multitude of other issues. It stands to reason that linear work is more feasible with animation due to having a more controlled environment. You don't have to worry about scheduling locations or weather as all work is done on a computer and actors don't have to get together for recordings (although the latter arguably helps in creating more authentic emotions). All said, you may have to prepare for the event that non-linear animation will happen. If you need to meet a deadline, for instance, you may need to move forward with scenes you have voices for while other actors finish up their portion of the script. The same can be said if you're collaborating with a team and you're waiting for assets needed...