The 908 is full of complex shapes, so design efforts have shifted to simplifying the structures wherever possible. This mostly involves looking around for opportunities to reduce the number of spline segments without sacrificing the overall form.
More segments makes for smoother curves and more complex shaping. More splines and segments require many small tabs which in turn require that much effort to cut them out. Since this model will eventually be built in paper at a relatively small scale, very subtle shifts in surface form may not be noticeable enough to justify the complexity. Fewer splines means fewer tabs and a model which is relatively easier, quicker, and less work to build. It's a balance in looking for the smoothest and most accurate form with the least number of segments.