kwinter
Contributor
And this is where marketing wins: if you believe the wiki of a thousand lies, helmets made no difference to the number of fatalities nor of head injuries among skiers, yet the most skiers are now wearing them.
There is another quite different perfect example of a disruptive innovation: what's been happening to energy utilities in the last few years, esp. over in .eu: there was no innovation per se, just steady progress on existing technologies coupled with politics coupled with market fluctuations.
Sorry to disagree with Wiki, but I was on the ski patrol for a great many years. I personally witnessed several times where a helmet undoubtedly helped avoid serious head injury, including my wife. When contact is made between noggin and something hard, a helmet is protective. Period.