Imagine a widely used and expensive prescription drug that promised to make us beautiful but didn't. Instead the drug had frequent, serious side effects: It induced stupidity, turned everyone into bores, wasted time, and degraded the quality and credibility of communication. These side effects would rightly lead to a worldwide product recall. Yet slideware--computer programs for presentations--is everywhere.
Tufte, Edward. Wired (2003). Articles>Presentations>Multimedia>Microsoft PowerPoint