The claim was "shopped around" and if you are going to change people's words do not be surprised when nobody takes your challenge. And preemptively: absence of evidence is not evidence of absence.
Also show me evidence of them "shopping around" code. I'll wait.
Just ignore them. Their validation is meaningless. Their ignorance is mostly meaningless, too, for reasons that feel mean to type out.
I have worked on DEs, I have committed to compositors. I know which side has more merit.
After holding up well for a long time, absence of evidence becomes a good indicator for actual evidence of absence.