No matter the origins of the Dofner organ, it had been around for so long that its design had reached a high degree of optimization.
Many races also managed to develop their own versions of the Dofner organ. By repeatedly stealing each other's homework, the successive iterations of this phasewater organ became more and more perfect.
Through this repeated theft-and-development cycle, the Dofner organs for every major race remained relatively uniform despite all of the improvements.
Of course, there was only so much the alien bioresearchers could do before they exhausted what they could do with their existing mastery of biotechnology.
The R&D cycle for the Dofner organ had reached a plateau a long time ago. The ones being made today were barely any better than ones in use hundreds of thousands of years in the past.
This was highly reassuring to humans as the high degree of universality of the design made it easier to adapt it to human physiques.
