As a physicist who also consults for wall st, I understand how Simons would conclude (perhaps unconsciously) &quot;free&quot; software is software with no _value_.<p>&quot;I was frustrated watching how he treated the other participants, so I didn&#x27;t say a word to him. I feel bad for failing to express myself.&quot;<p>If this is who you are, and I am similar, then you are not the right person to be &quot;selling&quot; sagemath. You need to find one of those lovely but vacuous motor-mouths to do this for you.