It would take a collection of factors for me to determine how I felt about longer gestation.
For example, I have Asian ethnicity and it's been speculated that Asians have shorter gestation. I think back to how DD started labor at exactly 39 weeks, yet had signs of post-date such as peeling skin on her hands and feet...I wonder about gestating longer for me personally.
Also my mom had conception dates for her pregnancy and went to exaaactly 40 weeks with each one that was an UC. (Hospital births were badly managed/intervened). In fact, with baby #8 she was 40 +1 without any labor signs so she went to the chiro to make sure everything was optimally positioned, and then had a free acupuncture session, came home and birthed my sister that day lol.
On the one hand I embrace the UC philosophies of trusting your body, and the baby's body, and providence. But on the other hand I do think the process of labor is a complex hormonal process that requires many things to work. In our world of endocrine disruptors, a struggle to find safe and healthy food, sub-optimal conditions for an open pelvis/strong spine etc I would not exclusively assume it was a good thing to go post-date.
That being said, there are many non-medical options to try. As I mentioned previously, acupuncture....massage, exercise, walking, making sure the baby is positioned and your pelvis is open...primrose oil, etc.