I must differ. Positive results are not achieved only in finding ET.
As I understand it, the SETI program has made great strides in advancing signal processing, massed computing, telemetry and other crap I am sure I do not understand.
Just as the fruits of the Mercury, Gemini and Apollo programs were far more than moon rocks.
They have never accomplished their primary mission: to find evidence of intelligent life in outer space. BIG WASTE OF MONEY!!!