Unwillingness to appropriate the personnel money (i.e. either hiring people with animating skills or giving a current staff member a raise and having them take on the responsibility of learning to animate) could be a major bottleneck.
Real animation is expensive; and there are many trade-offs for working with such an unstable and cpu-dependent technology. Besides; video and Flash are still "good enough" for most use cases (children animated series, educational videos, etc).
