Gunne:
"I do personally believe that stating that open source is some kind
of _guarantee_ for a particulary software to be continued developed
further is a completely false understanding."

How come "your" project Ambient continued beeing developed after Zapek
released it as open source? Without him releasing it, it would be completely,
100% dead today. Thanks to open source it is not.

There are numerous examples where open source was the savior
of abandoned software.

OK, you used the word guarantee and sure, there are no guarantees
in life besides taxes and your death. But the chances of software
living on after the original author got tired are a hell of a lot higher
if he releases it as open source than if it sits on a backup CD
somewhere..