From today's point of view, what is lacking in traditional hand-drawn illustrations?

Illustration is a unique art, with its rich forms of expression and strong appeal, it is still loved by people in this era. Hand-drawn illustration is the earliest form of expression of this art, it does not need to rely on any digital painting tools at all, as long as there is a pen and paper for painting or other painting media, it can be created. Compared with digital painting, hand-drawn illustrations can better reflect the artist's painting skills and artistic accomplishment, and there are various creative ways. However, with the rapid development of science and technology, the defects of hand-drawn illustrations have gradually emerged. Due to the influence of temperature, humidity and painting tools, the creative efficiency of hand-drawn illustrations can't keep up with the needs of society, and the production takes too long, and even there are problems such as poor drawing effect, difficult control and modification. These congenital defects lead to hand-drawn illustrations can not effectively serve the rapid turnover of modern commercial society. Therefore, the development speed of this unique hand-drawn illustration process has slowed down in recent years.