The Half-life of Software

The half-life of Software is the time required for a half of Software developed today to disappear from the market. Today the Half-life of Software is 4 years. The number I found analyzing the lifetime of 200+ discontinued Software.

Histogram of lifetimes of 200+ discontinued Software. Median values is 4 years.
Histogram of lifetimes of 200+ discontinued Software. Median values is 4 years.
Detailed histogram of lifetimes of 200+ discontinued Software, each bin here is one year.
Detailed histogram of lifetimes of 200+ discontinued Software, each bin here is one year.

There is an intriguing connection to Kruchten's hypothesis about five-year half-time of software engineering ideas, concepts, tools, and methods.

Philippe Kruchten. "The Biological Half-Life of Software Engineering Ideas", IEEE Software, 2008.
Philippe Kruchten. "The Biological Half-Life of Software Engineering Ideas", IEEE Software, 2008.