As we've shared, PowerPoint (PPT) is easy to learn, has built-in accessibility functions, and has an existing base familiarity level for a large number of office workers. It is an an industry standard used by many companies for training, for those reasons.
However, while PPT does have a greater number of features to keep the learner engaged with presentations than it did in the past, it is hard to compare PPT on equal footing with eLearning.