- It took the radio 40 years to reach a market penetration of 50 million
- 10 years for the TV
- 5 years for the iPod
- 6 months for YouTube
- Google+ might be even faster
But also despite all of this fast and good change, we still find that the past, was good at certain things. Matt Edgar uses the example, that the 18th century postal service ran twice daily mail services between major cities, and that that is sometimes more often than he checks his emails.

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