Too little attention is paid to motivation. In too many places teachers are expected to donate their own afternoons, evenings and weekends to the learning of new tools. This is serious work deserving full compensation and plenty of recognition. Don't rely on pioneers alone to plan for reluctants. Pioneers rarely sympathize with reluctants or understand their issues.
Pioneers have different needs and far more tolerance for frustration.
They rarely understand reluctants or how they learn. They find it difficult to design professional development for reluctants that works.